Ultramarathon race ratings
71 trail and road ultras, 29 of them 100 milers, scored out of 5 from 453 racer reviews and race reports. 321 more not yet rated. Pick up to three to compare.
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392 races
1. Umstead 100 Mile Endurance Run
Overall score 4.9Moderate evidence, 8 sources
Raleigh, NC
Next race 3 Apr 2027
Looped eastern 100
“Umstead was nearly a perfect race.” Devon Yanko, Chaski blog
1. Umstead 100 Mile Endurance Run
Overall score 4.9ExcellentModerate evidence · 8 sourcesTop 1%Raleigh, NC · Next race 3 Apr 2027
Racers loveSmooth crushed-gravel lap of 12.5 mi (20.1 km): little technical footing to worry about
Watch outEntry sells out in minutes, and a qualifying 50 mi finish is required
“Umstead was nearly a perfect race.” Devon Yanko, Chaski blog
- Distance
- 100 mi (161 km)
- Course
- Loop course
- Climbing
- Rolling, 80 ft/mi (15 m/km)
- Footing
- Smooth
- Cutoff
- 30 hours
- Field
- about 275
- 30 hours
2. Ghost Train Rail Trail Race, 30-Hour Ultramarathon (100 mi mark)
Overall score 4.8Strong evidence, 10 sources
Brookline, NH
Last race 17 Oct 2026
Generous cutoffs
“Halloween party disguised as a race” Lila Gaudrault, Substack
2. Ghost Train Rail Trail Race, 30-Hour Ultramarathon (100 mi mark)
Overall score 4.8ExcellentStrong evidence · 10 sourcesTop 2%Brookline, NH · Last race 17 Oct 2026
Racers loveFlat packed-dirt rail trail with about 91 m (300 ft) of gain per 24 km (15 mi) lap.
Watch outSold out in about 15 min in 2025; the 175-person waitlist probably will not clear.
“Halloween party disguised as a race” Lila Gaudrault, Substack
- Distance
- 30 hours
- Course
- Timed loop
- Footing
- Mostly smooth
- Cutoff
- 30 hours
- Finish rate
- 21%
- Field
- about 400
- 100 mi
3. Western States Endurance Run 100 Mile
Overall score 4.8Moderate evidence, 8 sources
Olympic Valley, CA
Next race 26 Jun 2027
Point to point, hilly · 30 hours
“The heat and effort were real.” Dan Jones, Daniel Jones, Substack
3. Western States Endurance Run 100 Mile
Overall score 4.8ExcellentModerate evidence · 8 sourcesTop 4%Olympic Valley, CA · Next race 26 Jun 2027
Racers loveOlympic Valley to Auburn over Emigrant Pass, 2,667 m (8,750 ft), with a river crossing at mile 78 (125.5 km)
Watch outLottery: 11,328 applicants for 369 spots in 2026, plus a qualifying finish required.
“The heat and effort were real.” Dan Jones, Daniel Jones, Substack
- Distance
- 100.2 mi (161 km)
- Course
- Point to point
- Climbing
- Hilly, 181 ft/mi (34 m/km)
- Footing
- Moderate
- Cutoff
- 30 hours
- Finish rate
- 87%
- Field
- about 369
4. Rocky Raccoon 100 Endurance Trail Race
Overall score 4.7Moderate evidence, 9 sources
Huntsville, TX
Next race 6 Feb 2027
Good first 100
“There is no such thing as an 'easy' 100 miler.” I Run Alaska (Brandon)
4. Rocky Raccoon 100 Endurance Trail Race
Overall score 4.7ExcellentModerate evidence · 9 sourcesTop 5%Huntsville, TX · Next race 6 Feb 2027
Racers loveFive 32.2 km (20 mi) loops on soft pine-needle trail with no rocks.
Watch outRoots trip tired runners in the dark and mud puddles can be ankle deep in wet years.
“There is no such thing as an 'easy' 100 miler.” I Run Alaska (Brandon)
- Distance
- 100 mi (161 km)
- Course
- Loop course
- Climbing
- Rolling, 62 ft/mi (12 m/km)
- Footing
- Mostly smooth
- Cutoff
- 32 hours
- Finish rate
- 57%
- Field
- about 415
5. Bandera 100K (Bandera Endurance Trail Race)
Overall score 4.4Moderate evidence, 9 sources
Bandera, TX
Next race 9 Jan 2027
Generous cutoffs
“Mt. Dew comes straight from heaven.” Rick H, Team RunRun
5. Bandera 100K (Bandera Endurance Trail Race)
Overall score 4.4Very goodModerate evidence · 9 sourcesTop 7%Bandera, TX · Next race 9 Jan 2027
Racers love25 hour limit for 100.2 km (62.3 mi); the aid chart's slowest finishing pace is 24:07 per mile.
Watch outRocky, steep footing and leg-cutting sotol over 100.2 km (62.3 mi) with 2,012 m (6,600 ft) of gain.
“Mt. Dew comes straight from heaven.” Rick H, Team RunRun
- Distance
- 100 km (62.3 mi)
- Course
- Loop course
- Climbing
- Rolling, 106 ft/mi (20 m/km)
- Footing
- Technical
- Cutoff
- 25 hours
- Finish rate
- 77%
- Field
- about 342
- 86 km Up
6. Comrades Marathon
Overall score 4.3Moderate evidence, 9 sources
Pietermaritzburg / Durban, South Africa
Next race 13 Jun 2027
Smooth footing
“hundreds of runners missing out on a medal” Stuart Mann, The Running Mann
6. Comrades Marathon
Overall score 4.3Very goodModerate evidence · 9 sourcesTop 8%Pietermaritzburg / Durban, South Africa · Next race 13 Jun 2027
Racers love49 official refreshment stations over 85.777 km (53.3 mi) on closed roads.
Watch out12-hour limit; the last 2026 cut-off sat 6.7 km (4.2 mi) from the finish with 35 min in hand.
“hundreds of runners missing out on a medal” Stuart Mann, The Running Mann
- Distance
- 85.8 km (53.3 mi)
- Course
- Point to point
- Footing
- Smooth
- Cutoff
- 12 hours
- Finish rate
- 90%
- Field
- about 20,349
7. Black Canyon 100K
Overall score 4.1Moderate evidence, 8 sources
Mayer, AZ
Next race 13 Feb 2027
Generous cutoffs
“Black Canyon 100K is a tricky course to pace.” Team Run Run, Dandelion Dilluvio-Scott
7. Black Canyon 100K
Overall score 4.1Very goodModerate evidence · 8 sourcesTop 9%Mayer, AZ · Next race 13 Feb 2027
Racers loveWestern States Super Golden Ticket: top 3 men and top 3 women earn 2027 entry.
Watch outThe early downhill tempts runners to start fast and wreck their quads before the climbing second half.
“Black Canyon 100K is a tricky course to pace.” Team Run Run, Dandelion Dilluvio-Scott
- Distance
- 100 km (62.2 mi)
- Course
- Point to point
- Climbing
- Rolling, 84 ft/mi (16 m/km)
- Footing
- Moderate
- Cutoff
- 20 hours
- Finish rate
- 92%
- Field
- about 1,200
8. Pinhoti 100
Overall score 4.1Strong evidence, 10 sources
Heflin to Sylacauga, AL
Next race 7 Nov 2026
Point to point, hilly · 32 hours
“Where are the real mountains?” Dan Thomas, TeamRunRun
8. Pinhoti 100
Overall score 4.1Very goodStrong evidence · 10 sourcesTop 11%Heflin to Sylacauga, AL · Next race 7 Nov 2026
Racers loveTrue point-to-point 161.5 km (100.4 mi) from Heflin to Sylacauga over Cheaha Mountain, 734 m (2,408 ft).
Watch outEvery station has a printed cutoff that tightens for the back of the pack; times ignore terrain.
“Where are the real mountains?” Dan Thomas, TeamRunRun
- Distance
- 100.4 mi (162 km)
- Course
- Point to point
- Climbing
- Hilly, 139 ft/mi (26 m/km)
- Footing
- Moderate
- Cutoff
- 32 hours
- Finish rate
- 77%
- 100 mi
9. Indiana Trail 100 Mile
Overall score 4.1Moderate evidence, 9 sources
Albion, IN
Last race 10 Oct 2026
Good first 100
“Be prepared for mud, wet, and cold!” Dave S (Scheibel), Team RunRun (Dave S)
9. Indiana Trail 100 Mile
Overall score 4.1Very goodModerate evidence · 9 sourcesTop 12%Albion, IN · Last race 10 Oct 2026
Racers loveFour 25 mi (40 km) loops with one start/finish and free tent camping beside the line.
Watch outPacers only from mile 50 (80 km) unless you are 65 or older.
“Be prepared for mud, wet, and cold!” Dave S (Scheibel), Team RunRun (Dave S)
- Distance
- 100 mi (161 km)
- Course
- Loop course
- Climbing
- Rolling, 60 ft/mi (11 m/km)
- Footing
- Mostly smooth
- Cutoff
- 30 hours
- Field
- about 250
- Backyard
10. Big's Backyard Ultra (Big Dog's Backyard Ultra World Championship)
Overall score 4.0Moderate evidence, 9 sources
Bell Buckle, TN
Last race 17 Oct 2026
Lapped course
Racers love The world championship of the format: one 6,706 m (4.167 mi) yard every hour until one runner is left.
10. Big's Backyard Ultra (Big Dog's Backyard Ultra World Championship)
Overall score 4.0Very goodModerate evidence · 9 sourcesTop 14%Bell Buckle, TN · Last race 17 Oct 2026
Racers loveThe world championship of the format: one 6,706 m (4.167 mi) yard every hour until one runner is left.
Watch outNot an open race: entry is by national silver-ticket win or at-large selection.
- Distance
- Backyard
- Course
- Backyard format
- Footing
- Moderate
- 24 hours
11. Hinson Lake 24 Hour Ultra Classic
Overall score 4.0Thin evidence, 3 sources
Rockingham, NC
Next race 25 Sep 2027
Generous cutoffs
“Completing the same loop 42 times may sound boring but it really wasn't.” RaceRaves (reviewer missmac17224)
11. Hinson Lake 24 Hour Ultra Classic
Overall score 4.0Very goodThin evidence · 3 sourcesRockingham, NC · Next race 25 Sep 2027
Racers loveTimed 24 hours on a certified 2.416 km (1.5 mi) lake loop; your result is the distance you cover.
Watch outEntry opens January 1 and usually sells out in a day or two; there is a waitlist.
“Completing the same loop 42 times may sound boring but it really wasn't.” RaceRaves (reviewer missmac17224)
- Distance
- 24 hours
- Course
- Timed loop
- Footing
- Mostly smooth
- Cutoff
- 24 hours
- Field
- about 500
12. Cocodona 250
Overall score 3.9Moderate evidence, 8 sources
Black Canyon City to Flagstaff, AZ
Next race 2 May 2027
Point to point, hilly · 125 hours
“the wheels were off the bus” Des Clarke, Team RunRun
12. Cocodona 250
Overall score 3.9Very goodModerate evidence · 8 sourcesTop 16%Black Canyon City to Flagstaff, AZ · Next race 2 May 2027
Racers lovePoint to point, 408 km (253.5 mi), Black Canyon City to Flagstaff via Prescott, Jerome and Sedona
Watch outLottery entry from 2027: 475 places, 300 waitlisted, $1,995 plus tax
“the wheels were off the bus” Des Clarke, Team RunRun
- Distance
- 253.5 mi (408 km)
- Course
- Point to point
- Climbing
- Hilly, 154 ft/mi (29 m/km)
- Footing
- Moderate
- Cutoff
- 125 hours
- Finish rate
- 66%
- Field
- about 475
- 100 mi
13. Superior 100 Mile (Superior Fall Trail Race)
Overall score 3.9Moderate evidence, 9 sources
Two Harbors (start) to Lutsen (finish), MN
Next race 10 Sep 2027
Point to point, hilly · 38 hours
“I give it a 10/10.” Team RunRun (Ashley Nordell)
13. Superior 100 Mile (Superior Fall Trail Race)
Overall score 3.9Very goodModerate evidence · 9 sourcesTop 18%Two Harbors (start) to Lutsen (finish), MN · Next race 10 Sep 2027
Racers lovePoint-to-point 165.6 km (102.9 mi) along the Superior Hiking Trail and Lake Superior.
Watch outVery technical single-track: roots, rocks and mud over 5,288 m (17,350 ft) of gain.
“I give it a 10/10.” Team RunRun (Ashley Nordell)
- Distance
- 103 mi (166 km)
- Course
- Point to point
- Climbing
- Hilly, 168 ft/mi (32 m/km)
- Footing
- Technical
- Cutoff
- 38 hours
- Finish rate
- 69%
- Field
- about 295
14. Cascade Crest 100 Mile Endurance Run
Overall score 3.8Moderate evidence, 7 sources
Easton, WA
Next race 16 Jul 2027
Mountain race
“on another level” Team Run Run (Rob Raux)
14. Cascade Crest 100 Mile Endurance Run
Overall score 3.8Very goodModerate evidence · 7 sourcesTop 19%Easton, WA · Next race 16 Jul 2027
Racers loveMount Rainier views from Thorp Mountain and about 48 km (30 mi) of Pacific Crest Trail
Watch outLottery entry, 8 h trail work (or $150 buyout) and a qualifying 100 mi or hard 50 mi
“on another level” Team Run Run (Rob Raux)
- Distance
- 100 mi (161 km)
- Course
- One big loop
- Climbing
- Mountain, 230 ft/mi (44 m/km)
- Footing
- Moderate
- Cutoff
- 34 hours
- Finish rate
- 67%
- Field
- about 180
15. Hardrock 100 Endurance Run
Overall score 3.8Moderate evidence, 7 sources
Silverton, CO
Next race 9 Jul 2027
Mountain race
“Are you going to finish this?” Team RunRun (Dandelion Dilluvio-Scott)
15. Hardrock 100 Endurance Run
Overall score 3.8Very goodModerate evidence · 7 sourcesTop 21%Silverton, CO · Next race 9 Jul 2027
Racers loveCourse tops out at Handies Peak, 4,282 m (14,048 ft); average elevation is about 3,410 m (11,186 ft).
Watch outOne-ticket applicants had about 0.3% odds in 2026, plus a qualifier and 8 h of service.
“Are you going to finish this?” Team RunRun (Dandelion Dilluvio-Scott)
- Distance
- 101.8 mi (164 km)
- Course
- One big loop
- Climbing
- Mountain, 328 ft/mi (62 m/km)
- Footing
- Very technical
- Cutoff
- 48 hours
- Finish rate
- 80%
- Field
- about 147
16. Bull Run Run 50 Mile
Overall score 3.8Moderate evidence, 8 sources
Clifton, VA
Next race 3 Apr 2027
Out and back, rolling · 13 hours
“The course is VERY well marked.” Meagan Denman, TeamRunRun
16. Bull Run Run 50 Mile
Overall score 3.8Very goodModerate evidence · 8 sourcesTop 22%Clifton, VA · Next race 3 Apr 2027
Racers loveBluebells line the northern section in early April, beside Bull Run and the Occoquan.
Watch outPacers are banned and drop bags are at only 3 stops.
“The course is VERY well marked.” Meagan Denman, TeamRunRun
- Distance
- 50.2 mi (80.8 km)
- Course
- Out and back
- Climbing
- Rolling, 105 ft/mi (20 m/km)
- Footing
- Moderate
- Cutoff
- 13 hours
- Finish rate
- 46%
- Field
- about 300
17. Javelina Jundred 100 Mile
Overall score 3.8Moderate evidence, 8 sources
Fountain Hills, AZ
Next race 31 Oct 2026
Good first 100
“Everything in the desert wants to hurt you.” Team Run Run, Stephen
17. Javelina Jundred 100 Mile
Overall score 3.8Very goodModerate evidence · 8 sourcesTop 24%Fountain Hills, AZ · Next race 31 Oct 2026
Racers loveFive loops with crew at one spot, so crew sees the runner about five times.
Watch outHeat is the main killer: 52% finished in 2016 and about 64% in 2025.
“Everything in the desert wants to hurt you.” Team Run Run, Stephen
- Distance
- 100 mi (161 km)
- Course
- Loop course
- Climbing
- Rolling, 63 ft/mi (12 m/km)
- Footing
- Moderate
- Cutoff
- 30 hours
- Finish rate
- 64%
- 100 mi
18. High Lonesome 100
Overall score 3.7Thin evidence, 2 sources
Buena Vista area, CO
Next race 16 Jul 2027
Mountain race
Racers love Two recent distance-matched runners praise the community and alpine setting.
18. High Lonesome 100
Overall score 3.7Very goodThin evidence · 2 sourcesBuena Vista area, CO · Next race 16 Jul 2027
Racers loveTwo recent distance-matched runners praise the community and alpine setting.
Watch outQualification and lottery selection limit entry.
- Distance
- 100 mi (161 km)
- Course
- One big loop
- Climbing
- Mountain, 235 ft/mi (45 m/km)
- Footing
- Technical
- Cutoff
- 37 hours
19. Waldo 100K Ultramarathon
Overall score 3.7Moderate evidence, 6 sources
Willamette Pass, OR
Next race 7 Aug 2027
One big loop, hilly · 18 hours
Racers love Forest singletrack, lakes and mountain summits.
19. Waldo 100K Ultramarathon
Overall score 3.7Very goodModerate evidence · 6 sourcesTop 26%Willamette Pass, OR · Next race 7 Aug 2027
Racers loveForest singletrack, lakes and mountain summits.
Watch outThree intermediate cutoffs apply before the eighteen-hour finish limit.
- Distance
- 101 km (62.5 mi)
- Course
- One big loop
- Climbing
- Hilly, 176 ft/mi (33 m/km)
- Footing
- Mostly smooth
- Cutoff
- 18 hours
20. Vermont 100 Endurance Race
Overall score 3.6Moderate evidence, 8 sources
West Windsor, VT
Next race 17 Jul 2027
Smooth footing
“the race doesn't really start until mile 70” Team Run Run, Brian E
20. Vermont 100 Endurance Race
Overall score 3.6Very goodModerate evidence · 8 sourcesTop 28%West Windsor, VT · Next race 17 Jul 2027
Racers loveRuns alongside a concurrent horse race, the last 100 mi event to do so.
Watch outHeat can bite: 2019 hit 36 °C (96 °F) and about 48% of starters finished.
“the race doesn't really start until mile 70” Team Run Run, Brian E
- Distance
- 100 mi (161 km)
- Course
- One big loop
- Climbing
- Hilly, 170 ft/mi (32 m/km)
- Footing
- Mostly smooth
- Cutoff
- 30 hours
- Finish rate
- 48%
- Field
- about 450
- 126K Classic
21. The North Face Transgrancanaria Classic 126K
Overall score 3.6Moderate evidence, 8 sources
Las Palmas de Gran Canaria, Spain
Next race 26 Feb 2027
Mountain race
“pack long windproof trousers and you will be ok” Carnethy Hill Runners (Phil Humphries)
21. The North Face Transgrancanaria Classic 126K
Overall score 3.6Very goodModerate evidence · 8 sourcesTop 29%Las Palmas de Gran Canaria, Spain · Next race 26 Feb 2027
Racers loveMidnight start on Las Canteras beach, finish at Parque Sur in Maspalomas, 126 km (78 mi).
Watch outCold wet nights, then heat near 30 °C (86 °F); the route was shortened for storms in 2022.
“pack long windproof trousers and you will be ok” Carnethy Hill Runners (Phil Humphries)
- Distance
- 126 km (78.3 mi)
- Course
- Point to point
- Climbing
- Mountain, 284 ft/mi (54 m/km)
- Footing
- Technical
- Cutoff
- 30 hours
- Field
- about 870
- 24 hour
22. Crooked Road 24 Hour Ultra
Overall score 3.6Thin evidence, 2 sources
Rocky Mount, VA
Next race 6 Mar 2027
Lapped course
Racers love A short circuit keeps personal supplies and support accessible every lap.
22. Crooked Road 24 Hour Ultra
Overall score 3.6Very goodThin evidence · 2 sourcesRocky Mount, VA · Next race 6 Mar 2027
Racers loveA short circuit keeps personal supplies and support accessible every lap.
Watch outBoth reviews predate the new organizer and the move from November to March.
- Distance
- 24 hour
- Course
- Timed loop
- Footing
- Mostly smooth
- Cutoff
- 24 hours
23. Uwharrie 100 Mile Trail Run
Overall score 3.6Strong evidence, 10 sources
Troy, NC
Last race 17 Oct 2026
Lapped course
“a deceptively tough race” Beltway Runner (Daisy Weill)
23. Uwharrie 100 Mile Trail Run
Overall score 3.6Very goodStrong evidence · 10 sourcesTop 32%Troy, NC · Last race 17 Oct 2026
Racers loveFive 33.0 km (20.5 mi) loops of almost entirely single track, passing the start every lap.
Watch outOfficial course page calls it unrelenting: 1,062 m (3,484 ft) of climb per loop and little flat ground.
“a deceptively tough race” Beltway Runner (Daisy Weill)
- Distance
- 102.5 mi (165 km)
- Course
- Loop course
- Climbing
- Hilly, 170 ft/mi (32 m/km)
- Footing
- Technical
- Cutoff
- 36 hours
- Finish rate
- 59%
- Field
- about 150
24. Old Dominion 100 Mile Cross Country Run
Overall score 3.5Moderate evidence, 8 sources
Woodstock, VA
Next race 5 Jun 2027
Generous cutoffs
“I love that and hope it doesn't change.” John Kelly, Random Forest Runner
24. Old Dominion 100 Mile Cross Country Run
Overall score 3.5Very goodModerate evidence · 8 sourcesTop 33%Woodstock, VA · Next race 5 Jun 2027
Racers loveOne of the oldest 100s in the US (since 1979), volunteer run with no sponsors.
Watch outA 50 mi or longer qualifier is required and only 110 slots exist; registration opens 28 November.
“I love that and hope it doesn't change.” John Kelly, Random Forest Runner
- Distance
- 100 mi (161 km)
- Course
- One big loop
- Climbing
- Hilly, 140 ft/mi (27 m/km)
- Footing
- Moderate
- Cutoff
- 28 hours
- Finish rate
- 76%
- Field
- about 110
- 50 mi
25. Cayuga Trails 50
Overall score 3.5Moderate evidence, 7 sources
Ithaca, NY
Next race 5 Jun 2027
Lapped course
“The second half of the race would prove to be the toughest.” Scott Dawson Substack (2017 race)
25. Cayuga Trails 50
Overall score 3.5Very goodModerate evidence · 7 sourcesTop 35%Ithaca, NY · Next race 5 Jun 2027
Racers loveDozens of waterfalls and gorges inside Robert H. Treman State Park, about 95% trail.
Watch outGain is 3,110 m (10,200 ft) with long stone staircases and steep gorge climbs.
“The second half of the race would prove to be the toughest.” Scott Dawson Substack (2017 race)
- Distance
- 50 mi (80.5 km)
- Course
- Loop course
- Climbing
- Mountain, 204 ft/mi (39 m/km)
- Footing
- Technical
- Cutoff
- 15 hours
- Field
- about 400
26. Patapsco Valley 50K
Overall score 3.5Thin evidence, 4 sources
Catonsville, MD
Last race 24 Oct 2026
Generous cutoffs
“It's an ULTRA, not an ACCURATE!” zhurnaly.com
26. Patapsco Valley 50K
Overall score 3.5Very goodThin evidence · 4 sourcesCatonsville, MD · Last race 24 Oct 2026
Racers loveTwo loops of about 26.1 km (16.2 mi) past Cascade Falls and Lost Lake
Watch outThe official site says clockwise for 2026 and does not say whether direction changes yearly
“It's an ULTRA, not an ACCURATE!” zhurnaly.com
- Distance
- 52.1 km (32.4 mi)
- Course
- Loop course
- Footing
- Moderate
- Cutoff
- 10 hours
- Finish rate
- 99%
27. Kettle Moraine 100 Mile Endurance Run
Overall score 3.5Moderate evidence, 9 sources
La Grange, WI
Last race 13 Jun 2026
Generous cutoffs
“Dead last! But finisher!” Kettle Moraine 100 race site (2021 report by…
27. Kettle Moraine 100 Mile Endurance Run
Overall score 3.5Very goodModerate evidence · 9 sourcesTop 38%La Grange, WI · Last race 13 Jun 2026
Racers loveWestern States qualifier with 65 mi (105 km) on the Ice Age National Scenic Trail.
Watch outHeat and humidity are common in June; 2026 finishing was 51% (112 of 219 starters).
“Dead last! But finisher!” Kettle Moraine 100 race site (2021 report by…
- Distance
- 100.5 mi (162 km)
- Course
- Out and back
- Climbing
- Rolling, 88 ft/mi (17 m/km)
- Footing
- Moderate
- Cutoff
- 30 hours
- Finish rate
- 51%
- Field
- about 219
- 100 mi
28. UTMB Grindstone 100 Mile (Grindstone Trail Running Festival by UTMB)
Overall score 3.5Moderate evidence, 9 sources
Mount Solon, VA
Next race 24 Sep 2027
Mountain race
“Above all, take the climbs easy!” Lukas Burrer, TeamRunRun
28. UTMB Grindstone 100 Mile (Grindstone Trail Running Festival by UTMB)
Overall score 3.5Very goodModerate evidence · 9 sourcesTop 39%Mount Solon, VA · Next race 24 Sep 2027
Racers loveStarts and finishes beside the Natural Chimneys limestone towers, with 104 mi (167 km) of ridges between.
Watch outCrew allowed at only 3 named places (5 stops); meeting your runner elsewhere risks disqualification.
“Above all, take the climbs easy!” Lukas Burrer, TeamRunRun
- Distance
- 104 mi (167 km)
- Course
- Out and back
- Climbing
- Mountain, 202 ft/mi (38 m/km)
- Footing
- Technical
- Cutoff
- 36 hours
- Finish rate
- 79%
29. C&O Canal 100 Mile
Overall score 3.4Moderate evidence, 7 sources
Knoxville (Camp Manidokan), MD
Next race 24 Apr 2027
Good first 100
“Maryland needs a Western States qualifier.” John Calabrese, VHTRC 2023 report
29. C&O Canal 100 Mile
Overall score 3.4GoodModerate evidence · 7 sourcesTop 40%Knoxville (Camp Manidokan), MD · Next race 24 Apr 2027
Racers loveAlmost entirely flat C&O towpath for 160.9 km (100 mi), packed dirt and small gravel.
Watch outThree loops on the same towpath; many runners call the night section lonely and repetitive.
“Maryland needs a Western States qualifier.” John Calabrese, VHTRC 2023 report
- Distance
- 100 mi (161 km)
- Course
- Loop course
- Footing
- Mostly smooth
- Cutoff
- 30 hours
- Field
- about 250
- 100 mi
30. Massanutten Mountain Trails 100 Mile Run
Overall score 3.4Moderate evidence, 8 sources
Fort Valley (Caroline Furnace Camp, near Woodstock), VA
Next race 15 May 2027
Open entry
“MMT's signature feature is its rocks which constantly nag you.” Andy Jones-Wilkins, iRunFar, Classic U.S. Ultras: MMT 100 (2020)
30. Massanutten Mountain Trails 100 Mile Run
Overall score 3.4GoodModerate evidence · 8 sourcesTop 42%Fort Valley (Caroline Furnace Camp, near Woodstock), VA · Next race 15 May 2027
Racers loveVolunteer club race since 1995 with no sponsors and a $250 entry for 100.6 mi (161.9 km).
Watch outRocks are constant: leaf-covered, slick and ankle-rolling, with steep rocky descents in the dark.
“MMT's signature feature is its rocks which constantly nag you.” Andy Jones-Wilkins, iRunFar, Classic U.S. Ultras: MMT 100 (2020)
- Distance
- 100.6 mi (162 km)
- Course
- One big loop
- Climbing
- Hilly, 184 ft/mi (35 m/km)
- Footing
- Very technical
- Cutoff
- 36 hours
- Finish rate
- 56%
- Field
- about 250
31. Antelope Canyon Ultras 50 Mile
Overall score 3.4Thin evidence, 4 sources
Page, AZ
Next race 6 Mar 2027
Open entry
Racers love Slot-canyon access, sandstone scenery and river overlooks.
31. Antelope Canyon Ultras 50 Mile
Overall score 3.4GoodThin evidence · 4 sourcesPage, AZ · Next race 6 Mar 2027
Racers loveSlot-canyon access, sandstone scenery and river overlooks.
Watch outDeep sand, ladders and exposed technical sections require preparation.
- Distance
- 51.7 mi (83.2 km)
- Course
- One big loop
- Climbing
- Rolling, 97 ft/mi (18 m/km)
- Footing
- Technical
- Cutoff
- 19 hours
32. Tahoe 200 Endurance Run
Overall score 3.4Moderate evidence, 8 sources
Stateline, NV
Next race 21 Jun 2027
One big loop, hilly · 105 hours
Racers love One loop of Lake Tahoe: 322.5 km (200.4 mi), mostly on the Tahoe Rim Trail
32. Tahoe 200 Endurance Run
Overall score 3.4GoodModerate evidence · 8 sourcesTop 43%Stateline, NV · Next race 21 Jun 2027
Racers loveOne loop of Lake Tahoe: 322.5 km (200.4 mi), mostly on the Tahoe Rim Trail
Watch outSold out for 2027, waitlist only; $1,795 plus fees
- Distance
- 200.4 mi (323 km)
- Course
- One big loop
- Climbing
- Hilly, 160 ft/mi (30 m/km)
- Footing
- Technical
- Cutoff
- 105 hours
- Finish rate
- 70%
- Field
- about 261
33. Bali Hope Ultra
Overall score 3.4Thin evidence, 2 sources
Lovina to Munggu Beach, Indonesia
Next race 22 May 2027
Point to point
Racers love Historical runners valued the shared fundraising week and mobile support.
33. Bali Hope Ultra
Overall score 3.4GoodThin evidence · 2 sourcesLovina to Munggu Beach, Indonesia · Next race 22 May 2027
Racers loveHistorical runners valued the shared fundraising week and mobile support.
Watch outExact 2027 length remains unconfirmed; historical reports cover 84 km (52.2 mi).
- Distance
- Ultra
- Course
- Point to point
- Footing
- Moderate
- Renamed
34. Sonoma Fall Classic OG 50 Mile (formerly the Lake Sonoma 50)
Overall score 3.4Moderate evidence, 8 sources
Healdsburg, CA
Last race 17 Oct 2026
Generous cutoffs
“One of the best organized races I've run!!” Team Run Run (Ashley Nordell)
34. Sonoma Fall Classic OG 50 Mile (formerly the Lake Sonoma 50)
Overall score 3.4GoodModerate evidence · 8 sourcesTop 46%Healdsburg, CA · Last race 17 Oct 2026
RenamedRacers loveOriginal 2008 start at South Lake Trailhead, with a 16 h limit for 82.9 km (51.5 mi)
Watch outFirst October edition: April-race reports and cutoffs may not apply to this course or organiser
“One of the best organized races I've run!!” Team Run Run (Ashley Nordell)
- Distance
- 51.5 mi (82.9 km)
- Course
- Out and back
- Climbing
- Mountain, 206 ft/mi (39 m/km)
- Footing
- Mostly smooth
- Cutoff
- 16 hours
- Finish rate
- 79%
35. Terrapin Mountain 50K
Overall score 3.4Moderate evidence, 7 sources
Sedalia (Big Island), VA
Next race 20 Mar 2027
Mountain race
“honest-to-goodness competitive again” Andy Jones-Wilkins, iRunFar
35. Terrapin Mountain 50K
Overall score 3.4GoodModerate evidence · 7 sourcesTop 46%Sedalia (Big Island), VA · Next race 20 Mar 2027
Racers love2,134 m (7,000 ft) of climbing in 50.1 km (31.1 mi), with a smooth dirt-road descent between big climbs.
Watch outOne hard cutoff at mile 25.6 (41.2 km): reach Terrapin Mtn Lane aid by 2:15 PM (7:15 elapsed).
“honest-to-goodness competitive again” Andy Jones-Wilkins, iRunFar
- Distance
- 50.1 km (31 mi)
- Course
- Out and back
- Climbing
- Mountain, 225 ft/mi (43 m/km)
- Footing
- Moderate
- Cutoff
- 9 hours
- Finish rate
- 95%
36. Burning River 100 Mile Endurance Run
Overall score 3.4Moderate evidence, 9 sources
Cuyahoga Falls, OH
Next race 31 Jul 2027
Generous cutoffs
“The course was incredibly well-marked!” Team RunRun (Ted Bross, 2022)
36. Burning River 100 Mile Endurance Run
Overall score 3.4GoodModerate evidence · 9 sourcesTop 50%Cuyahoga Falls, OH · Next race 31 Jul 2027
Racers loveOut and back: about 113 km (70 mi) of trail, 19 km (12 mi) of towpath and 29 km (18 mi) of road.
Watch outLate-July heat and humidity; one runner report puts the 2025 finish rate at 41 percent.
“The course was incredibly well-marked!” Team RunRun (Ted Bross, 2022)
- Distance
- 101.8 mi (164 km)
- Course
- Out and back
- Climbing
- Rolling, 79 ft/mi (15 m/km)
- Footing
- Mostly smooth
- Cutoff
- 30 hours
- Finish rate
- 41%
37. Run Rabbit Run 100
Overall score 3.3Moderate evidence, 7 sources
Steamboat Springs, CO
Next race 17 Sep 2027
Mountain race
“Patience is imperative on this course!” Team RunRun (Dandelion Dilluvio-Scott)
37. Run Rabbit Run 100
Overall score 3.3GoodModerate evidence · 7 sourcesBottom 49%Steamboat Springs, CO · Next race 17 Sep 2027
Racers loveNo qualifier: open registration, and a $300,000 purse is promised for 2027 and 2028.
Watch outRegistration fills; 2026 had a waitlist and prices rose from $385 to $595.
“Patience is imperative on this course!” Team RunRun (Dandelion Dilluvio-Scott)
- Distance
- 101.8 mi (164 km)
- Course
- One big loop
- Climbing
- Mountain, 200 ft/mi (38 m/km)
- Footing
- Moderate
- Cutoff
- 36 hours
- Finish rate
- 64%
- Field
- about 450
38. Mountain Masochist Trail Run 50 Mile
Overall score 3.3Moderate evidence, 8 sources
Montebello, VA
Next race 7 Nov 2026
Out and back, hilly · 13 hours
“Dropping was the right call.” JD (Rural Runner), Rural Runner (Substack)
38. Mountain Masochist Trail Run 50 Mile
Overall score 3.3GoodModerate evidence · 8 sourcesBottom 48%Montebello, VA · Next race 7 Nov 2026
Racers loveStarts and finishes at Montebello Campground, with no shuttle needed and a Friday meal and briefing.
Watch outCutoffs at mile 39.3 (63.2 km), 15:45, and mile 41.9 (67.4 km), 16:20, are tight against 13 h pace.
“Dropping was the right call.” JD (Rural Runner), Rural Runner (Substack)
- Distance
- 51.2 mi (82.4 km)
- Course
- Out and back
- Climbing
- Hilly, 176 ft/mi (33 m/km)
- Footing
- Moderate
- Cutoff
- 13 hours
- Finish rate
- 84%
39. Tarawera T102
Overall score 3.3Thin evidence, 2 sources
Rotorua, New Zealand
Next race 13 Feb 2027
Generous cutoffs
Racers love Runnable forestry roads between forest trails
39. Tarawera T102
Overall score 3.3GoodThin evidence · 2 sourcesRotorua, New Zealand · Next race 13 Feb 2027
Racers loveRunnable forestry roads between forest trails
Watch outEarlier editions used materially different courses
- Distance
- 102 km (63.4 mi)
- Course
- Point to point
- Climbing
- Hilly, 119 ft/mi (23 m/km)
- Footing
- Moderate
- Cutoff
- 30 hours
- 100 mi
40. Mohican Trail 100 Mile Run
Overall score 3.2Moderate evidence, 9 sources
Loudonville, OH
Next race 5 Jun 2027
Lapped course
“This race has been held for over 30 years and is really well run!” Team RunRun (Sarah Forman, 2021)
40. Mohican Trail 100 Mile Run
Overall score 3.2GoodModerate evidence · 9 sourcesBottom 45%Loudonville, OH · Next race 5 Jun 2027
Racers loveFour loops from one campground: two of about 43 km (27 mi), then two of about 37 km (23 mi).
Watch out4,303 m (14,118 ft) of climbing on roots, rocks and stairs; 43 percent finished in 2026.
“This race has been held for over 30 years and is really well run!” Team RunRun (Sarah Forman, 2021)
- Distance
- 100.2 mi (161 km)
- Course
- Loop course
- Climbing
- Hilly, 141 ft/mi (27 m/km)
- Footing
- Moderate
- Cutoff
- 32 hours
- Finish rate
- 43%
- Field
- about 200
- 50.2 mi
41. JFK 50 Mile
Overall score 3.2Moderate evidence, 8 sources
Boonsboro (start) to Williamsport (finish), MD
Next race 21 Nov 2026
Point to point · 13 hours
“You can, you will, you are strong.” Michael Stowe, NRV Runs, 2024 JFK 50 race report
41. JFK 50 Mile
Overall score 3.2GoodModerate evidence · 8 sourcesBottom 44%Boonsboro (start) to Williamsport (finish), MD · Next race 21 Nov 2026
Racers loveThe oldest US ultra, first held in 1963, with a 13 h limit for 80.8 km (50.2 mi).
Watch outEight cutoffs, the first 45 min in at mile 2.5 (4 km); missing one forces withdrawal.
“You can, you will, you are strong.” Michael Stowe, NRV Runs, 2024 JFK 50 race report
- Distance
- 50.2 mi (80.8 km)
- Course
- Point to point
- Footing
- Moderate
- Cutoff
- 13 hours
- Finish rate
- 91%
42. UTMB Mont-Blanc 100M (the 171 km UTMB, not CCC or OCC)
Overall score 3.2Moderate evidence, 9 sources
Chamonix, France
Last race 28 Aug 2026
Mountain race
“not really runnable at all” Educated Guesswork
42. UTMB Mont-Blanc 100M (the 171 km UTMB, not CCC or OCC)
Overall score 3.2GoodModerate evidence · 9 sourcesBottom 42%Chamonix, France · Last race 28 Aug 2026
Racers loveA loop of Mont Blanc through France, Italy and Switzerland: 174 km (108 mi), 9,700 m (31,800 ft) gain.
Watch outLottery entry needs Running Stones and a 100K or 100M UTMB Index; 479 EUR (about 550 USD) plus fees.
“not really runnable at all” Educated Guesswork
- Distance
- 108 mi (174 km)
- Course
- One big loop
- Climbing
- Mountain, 294 ft/mi (56 m/km)
- Footing
- Technical
- Cutoff
- 46.8 hours
- Finish rate
- 70%
- Field
- about 2,407
43. Never Summer 100K
Overall score 3.2Thin evidence, 3 sources
Gould, CO
Next race 31 Jul 2027
Mountain race
Racers love Three distance-matched historical runners praise the mountain setting and community.
43. Never Summer 100K
Overall score 3.2GoodThin evidence · 3 sourcesGould, CO · Next race 31 Jul 2027
Racers loveThree distance-matched historical runners praise the mountain setting and community.
Watch outThe advertised 100K currently measures 65.7 mi (105.7 km).
- Distance
- 106 km (65.7 mi)
- Course
- One big loop
- Climbing
- Mountain, 221 ft/mi (42 m/km)
- Footing
- Technical
- Cutoff
- 24 hours
- 8 hours
44. 8-Hour Dream Endurance Race
Overall score 3.1Thin evidence, 4 sources
Indianapolis, IN
Last race 11 Jul 2026
Generous cutoffs
Racers love Choose solo mileage across two optional loops during eight hours.
44. 8-Hour Dream Endurance Race
Overall score 3.1GoodThin evidence · 4 sourcesIndianapolis, IN · Last race 11 Jul 2026
Racers loveChoose solo mileage across two optional loops during eight hours.
Watch outPrepare for July heat, humidity and potentially muddy trail sections.
- Distance
- 8 hours
- Course
- Timed loop
- Footing
- Moderate
- Cutoff
- 8 hours
- 135 mi
45. Badwater 135
Overall score 3.1Moderate evidence, 7 sources
Death Valley to Lone Pine, CA
Next race 19 Jul 2027
Smooth footing
“Badwater takes cooling to a whole new level.” Badwater.com Lessons Learned (Amanda McIntosh)
45. Badwater 135
Overall score 3.1GoodModerate evidence · 7 sourcesBottom 39%Death Valley to Lone Pine, CA · Next race 19 Jul 2027
Racers love217 km (135 mi) from 86 m (282 ft) below sea level to 2,548 m (8,360 ft)
Watch outInvitation only: about 100 places, a strict qualifying standard and a $1,695 fee
“Badwater takes cooling to a whole new level.” Badwater.com Lessons Learned (Amanda McIntosh)
- Distance
- 135 mi (217 km)
- Course
- Point to point
- Climbing
- Rolling, 108 ft/mi (21 m/km)
- Footing
- Smooth
- Cutoff
- 45 hours
- Finish rate
- 93%
- Field
- about 100
46. Arches Ultra 50 K
Overall score 3.1Thin evidence, 2 sources
Moab, UT
Next race 30 Jan 2027
Open entry
Racers love Two distance-matched runners valued the scenery and their finishes.
46. Arches Ultra 50 K
Overall score 3.1GoodThin evidence · 2 sourcesMoab, UT · Next race 30 Jan 2027
Racers loveTwo distance-matched runners valued the scenery and their finishes.
Watch outFollow slickrock flags and paint carefully.
- Distance
- 51.5 km (32 mi)
- Course
- One big loop
- Climbing
- Rolling, 90 ft/mi (17 m/km)
- Footing
- Moderate
- Cutoff
- 11 hours
47. Arches Ultra 50 Mile
Overall score 3.1Thin evidence, 2 sources
Moab, UT
Next race 30 Jan 2027
Open entry
Racers love Two full-distance historical accounts praise the scenery and their finishes.
47. Arches Ultra 50 Mile
Overall score 3.1GoodThin evidence · 2 sourcesMoab, UT · Next race 30 Jan 2027
Racers loveTwo full-distance historical accounts praise the scenery and their finishes.
Watch outBoth athlete reports describe 2019; current operations may differ.
- Distance
- 50 mi (80.5 km)
- Course
- One big loop
- Climbing
- Rolling, 90 ft/mi (17 m/km)
- Footing
- Moderate
- Cutoff
- 12 hours
48. Highlands Sky 40 Mile Trail Run
Overall score 3.1Moderate evidence, 6 sources
Davis, WV
Last race 20 Jun 2026
Point to point, hilly · 12 hours
“a family reunion” Substack (Caleb Bowen)
48. Highlands Sky 40 Mile Trail Run
Overall score 3.1GoodModerate evidence · 6 sourcesBottom 34%Davis, WV · Last race 20 Jun 2026
Racers lovePoint-to-point over Roaring Plains and Dolly Sods: 66.0 km (41 mi) with 1,668 m (5,474 ft) of climb
Watch outFour enforced cutoffs; the first is 3 h 15 min for 10.5 mi (16.9 km)
“a family reunion” Substack (Caleb Bowen)
- Distance
- 41 mi (66 km)
- Course
- Point to point
- Climbing
- Hilly, 134 ft/mi (25 m/km)
- Footing
- Technical
- Cutoff
- 12 hours
- Field
- about 200
49. Lavaredo Ultra Trail 120K (La Sportiva Lavaredo Ultra Trail by UTMB)
Overall score 3.1Moderate evidence, 8 sources
Cortina d'Ampezzo, Italy
Next race 25 Jun 2027
Mountain race
“Most of the race is on pretty hard ground.” Alecsa Stewart, Runnerslab
49. Lavaredo Ultra Trail 120K (La Sportiva Lavaredo Ultra Trail by UTMB)
Overall score 3.1GoodModerate evidence · 8 sourcesBottom 32%Cortina d'Ampezzo, Italy · Next race 25 Jun 2027
Racers loveNight start in Cortina; faster runners reach the Tre Cime di Lavaredo around sunrise.
Watch outLottery needs a 100K or 100M UTMB Index; the fee rose to 320 EUR (about 370 USD) for 2027.
“Most of the race is on pretty hard ground.” Alecsa Stewart, Runnerslab
- Distance
- 120 km (74.6 mi)
- Course
- One big loop
- Climbing
- Mountain, 255 ft/mi (48 m/km)
- Footing
- Technical
- Cutoff
- 30 hours
- Finish rate
- 76%
- Field
- about 1,800
50. Devil Dog Ultras 100 Mile
Overall score 3.0Moderate evidence, 8 sources
Triangle, VA
Next race 5 Dec 2026
Looped eastern 100
“The volunteers here were incredible.” Erik Price, VHTRC news
50. Devil Dog Ultras 100 Mile
Overall score 3.0GoodModerate evidence · 8 sourcesBottom 31%Triangle, VA · Next race 5 Dec 2026
Racers loveSingle-track loops in a national park forest: 23 mi (37 km), then four of 19.5 mi (31.4 km)
Watch outCutoffs start only at mile 81 (131 km): 07:30 Sunday, then Gunny 09:00 and Toofy 11:30
“The volunteers here were incredible.” Erik Price, VHTRC news
- Distance
- 101 mi (163 km)
- Course
- Loop course
- Climbing
- Rolling, 102 ft/mi (19 m/km)
- Footing
- Moderate
- Cutoff
- 32 hours
- Finish rate
- 56%
- Field
- about 300
51. Bighorn 100 Mile Endurance Run
Overall score 3.0Moderate evidence, 9 sources
Dayton, WY
Last race 19 Jun 2026
Mountain race
“Whatever happened out there, I'd have to be the one to solve it.” Gingerbread Man Running (Bighorn 100 2026)
51. Bighorn 100 Mile Endurance Run
Overall score 3.0GoodModerate evidence · 9 sourcesBottom 30%Dayton, WY · Last race 19 Jun 2026
Racers loveOpen entry with no qualifier; registration opens October 15 for the June race.
Watch outMud and bog are common; 2017 to 2019 and 2023 were wet and slow.
“Whatever happened out there, I'd have to be the one to solve it.” Gingerbread Man Running (Bighorn 100 2026)
- Distance
- 100 mi (161 km)
- Course
- Out and back
- Climbing
- Mountain, 205 ft/mi (39 m/km)
- Footing
- Technical
- Cutoff
- 35 hours
- Finish rate
- 79%
52. Eiger Ultra Trail E101
Overall score 3.0Thin evidence, 2 sources
Grindelwald, Switzerland
Next race 17 Jul 2027
Mountain race
Racers love Alpine scenery praised by independent finishers
52. Eiger Ultra Trail E101
Overall score 3.0GoodThin evidence · 2 sourcesGrindelwald, Switzerland · Next race 17 Jul 2027
Racers loveAlpine scenery praised by independent finishers
Watch outSubstantial climbing and exposed mountain sections
- Distance
- 101 km (62.8 mi)
- Course
- One big loop
- Climbing
- Mountain, 350 ft/mi (66 m/km)
- Footing
- Technical
- Cutoff
- 25 hours
53. Hong Kong 100
Overall score 3.0Thin evidence, 2 sources
Hong Kong, Hong Kong
Next race 23 Jan 2027
Mountain race
Racers love Coastal scenery contrasts with city views
53. Hong Kong 100
Overall score 3.0GoodThin evidence · 2 sourcesHong Kong, Hong Kong · Next race 23 Jan 2027
Racers loveCoastal scenery contrasts with city views
Watch outMuch of the climbing comes late
- Distance
- 100 km (62 mi)
- Course
- Point to point
- Climbing
- Mountain, 271 ft/mi (51 m/km)
- Footing
- Technical
- Cutoff
- 30 hours
- 50 mi
54. Le Grizz 50 Mile Ultramarathon
Overall score 3.0Thin evidence, 2 sources
Polebridge, MT
Next race 9 Oct 2027
Smooth footing
Racers love A long-running Montana event continues with standalone 50 mi (80.5 km) entry.
54. Le Grizz 50 Mile Ultramarathon
Overall score 3.0GoodThin evidence · 2 sourcesPolebridge, MT · Next race 9 Oct 2027
Racers loveA long-running Montana event continues with standalone 50 mi (80.5 km) entry.
Watch outBoth reviews concern previous routes; the start and finish moved again in 2026.
- Distance
- 50 mi (80.5 km)
- Course
- Out and back
- Climbing
- Rolling, 48 ft/mi (9.1 m/km)
- Footing
- Mostly smooth
- 100K
55. Hellgate 100K++
Overall score 3.0Moderate evidence, 9 sources
Natural Bridge Station, VA
Next race 12 Dec 2026
Point to point, hilly · 18 hours
“I was struggle-festing in the worst way.” Erin Surette, Believe in the Run
55. Hellgate 100K++
Overall score 3.0GoodModerate evidence · 9 sourcesBottom 24%Natural Bridge Station, VA · Next race 12 Dec 2026
Racers loveMidnight start, point to point through the Blue Ridge to Camp Bethel, with a free lodge for runners.
Watch outTwo cutoffs: Floyd's Field (race mile 22.5 / 36 km (22.4 mi)) by 06:40, Bearwallow (42.5 / 68 km (42.3 mi))…
“I was struggle-festing in the worst way.” Erin Surette, Believe in the Run
- Distance
- 107 km (66.6 mi)
- Course
- Point to point
- Climbing
- Hilly, 195 ft/mi (37 m/km)
- Footing
- Moderate
- Cutoff
- 18 hours
- Finish rate
- 87%
- Field
- about 150
- 100 mi
56. Leadville Trail 100 Run
Overall score 2.9Moderate evidence, 7 sources
Leadville, CO
Next race 21 Aug 2027
Out and back, hilly · 30 hours
“Either I would be back by 10 PM or my race was over.” La Sportiva, Jeff Beecham
56. Leadville Trail 100 Run
Overall score 2.9GoodModerate evidence · 7 sourcesBottom 23%Leadville, CO · Next race 21 Aug 2027
Racers loveHope Pass at about 3,810 m (12,500 ft) is crossed twice on an out-and-back from Leadville.
Watch outCutoffs stop about half the field: Winfield, mile 52.2 (84 km), closes 14:50 into the race.
“Either I would be back by 10 PM or my race was over.” La Sportiva, Jeff Beecham
- Distance
- 99.7 mi (161 km)
- Course
- Out and back
- Climbing
- Hilly, 155 ft/mi (29 m/km)
- Footing
- Moderate
- Cutoff
- 30 hours
- Finish rate
- 53%
- 100 mi
57. Mt. FUJI 100 FUJI100mi
Overall score 2.9Thin evidence, 2 sources
Fuji to Fujiyoshida, Japan
Next race 23 Apr 2027
Mountain race
Racers love Japanese-language firsthand accounts from different performance levels
57. Mt. FUJI 100 FUJI100mi
Overall score 2.9GoodThin evidence · 2 sourcesFuji to Fujiyoshida, Japan · Next race 23 Apr 2027
Racers loveJapanese-language firsthand accounts from different performance levels
Watch outSome runners will encounter a second night
- Distance
- 102.7 mi (165 km)
- Course
- Point to point
- Climbing
- Mountain, 206 ft/mi (39 m/km)
- Footing
- Moderate
- Cutoff
- 45.5 hours
- Field
- about 2,000
58. Ultra-Trail Australia UTA100
Overall score 2.9Thin evidence, 2 sources
Katoomba, Australia
Next race 15 May 2027
Mountain race
Racers love Blue Mountains scenery
58. Ultra-Trail Australia UTA100
Overall score 2.9GoodThin evidence · 2 sourcesKatoomba, Australia · Next race 15 May 2027
Racers loveBlue Mountains scenery
Watch outPrepare for repeated stairs and the final Furber Steps
- Distance
- 101 km (62.8 mi)
- Course
- One big loop
- Climbing
- Mountain, 230 ft/mi (44 m/km)
- Footing
- Technical
- Cutoff
- 28 hours
59. Ultra-Trail Cape Town UT100
Overall score 2.9Thin evidence, 2 sources
Cape Town, South Africa
Next race 21 Nov 2026
Mountain race
Racers love Mountain, coastal and city scenery in one route
59. Ultra-Trail Cape Town UT100
Overall score 2.9GoodThin evidence · 2 sourcesCape Town, South Africa · Next race 21 Nov 2026
Racers loveMountain, coastal and city scenery in one route
Watch outRock steps and scrambling make pace estimates difficult
- Distance
- 99.1 km (61.6 mi)
- Course
- One big loop
- Climbing
- Mountain, 267 ft/mi (51 m/km)
- Footing
- Very technical
- Cutoff
- 26 hours
- 100 mi
60. Wasatch Front 100 Mile Endurance Run
Overall score 2.9Moderate evidence, 7 sources
Kaysville to Midway, UT
Last race 11 Sep 2026
Mountain race
“I went out way too hot and was in trouble at Lambs Canyon.” Wasatch 100 history (Dana Miller): Smoke 'n Hot…
60. Wasatch Front 100 Mile Endurance Run
Overall score 2.9GoodModerate evidence · 7 sourcesBottom 17%Kaysville to Midway, UT · Last race 11 Sep 2026
Racers lovePoint-to-point ridge traverse from Kaysville to Soldier Hollow, topping out at 3,189 m (10,462 ft).
Watch outFinish rate ran 52 to 65% in 2022 to 2026; hot, exposed ridges after Big Mountain.
“I went out way too hot and was in trouble at Lambs Canyon.” Wasatch 100 history (Dana Miller): Smoke 'n Hot…
- Distance
- 100 mi (161 km)
- Course
- Point to point
- Climbing
- Mountain, 240 ft/mi (46 m/km)
- Footing
- Technical
- Cutoff
- 36 hours
- Finish rate
- 60%
- Field
- about 396
61. TransJeju Jeju 100K
Overall score 2.8Thin evidence, 2 sources
Seogwipo, South Korea
Last race 3 Oct 2026
Mountain race
Racers love Hallasan mountain trails and volcanic scenery
61. TransJeju Jeju 100K
Overall score 2.8GoodThin evidence · 2 sourcesSeogwipo, South Korea · Last race 3 Oct 2026
Racers loveHallasan mountain trails and volcanic scenery
Watch outSlippery rock and long stairs demand specific preparation
- Distance
- 104 km (64.6 mi)
- Climbing
- Mountain, 203 ft/mi (39 m/km)
- Footing
- Technical
- Cutoff
- 29 hours
62. Eastern States 100
Overall score 2.8Moderate evidence, 5 sources
Waterville, PA
Next race 14 Aug 2027
Mountain race
“smile through the darkest moments” Rush of It All, Jeff Calvert (preview)
62. Eastern States 100
Overall score 2.8GoodModerate evidence · 5 sourcesBottom 14%Waterville, PA · Next race 14 Aug 2027
Racers loveSingle loop of 103 mi (166 km) around Pine Creek Gorge, 98% single or double track
Watch out36 h limit with latest-departure deadlines at ten stations; 46% finished in 2026
“smile through the darkest moments” Rush of It All, Jeff Calvert (preview)
- Distance
- 103.5 mi (167 km)
- Course
- One big loop
- Climbing
- Mountain, 203 ft/mi (38 m/km)
- Footing
- Technical
- Cutoff
- 36 hours
- Finish rate
- 46%
- Field
- about 300
63. Ironstone 100 K
Overall score 2.8Thin evidence, 2 sources
Hollidaysburg, PA
Next race 10 Jul 2027
Point to point, hilly · 23 hours
Racers love A recent finisher praises thoughtful volunteers and the personal finish welcome.
63. Ironstone 100 K
Overall score 2.8GoodThin evidence · 2 sourcesHollidaysburg, PA · Next race 10 Jul 2027
Racers loveA recent finisher praises thoughtful volunteers and the personal finish welcome.
Watch outPrior trail-ultra qualification is required; this is unsuitable as a first ultra.
- Distance
- 102 km (63.4 mi)
- Course
- Point to point
- Climbing
- Hilly, 126 ft/mi (24 m/km)
- Footing
- Technical
- Cutoff
- 23 hours
- Finish rate
- 73%
64. Georgia Death Race
Overall score 2.8Strong evidence, 10 sources
Blairsville, GA
Next race 27 Mar 2027
Mountain race
“hotter than hell and half of Georgia” Believe in the Run (2019 Georgia Death Race…
64. Georgia Death Race
Overall score 2.8GoodStrong evidence · 10 sourcesBottom 11%Blairsville, GA · Next race 27 Mar 2027
Racers lovePoint-to-point 119 km (74 mi) with 4,877 m (16,000 ft) of climbing, finishing at Amicalola Falls.
Watch outNo pacers allowed and drop bags at only 2 stations: Point Bravo and Jake Bull.
“hotter than hell and half of Georgia” Believe in the Run (2019 Georgia Death Race…
- Distance
- 74 mi (119 km)
- Course
- Point to point
- Climbing
- Mountain, 216 ft/mi (41 m/km)
- Footing
- Technical
- Cutoff
- 25 hours
- Finish rate
- 66%
- Field
- about 280
- 70.5 mi
65. Laurel Highlands Ultra 70.5 Mile
Overall score 2.8Moderate evidence, 6 sources
Ohiopyle, PA
Next race 12 Jun 2027
Point to point · 22 hours
Racers love Point-to-point 113.5 km (70.5 mi) along the Laurel Highlands Hiking Trail, held since 1980.
65. Laurel Highlands Ultra 70.5 Mile
Overall score 2.8GoodModerate evidence · 6 sourcesBottom 11%Ohiopyle, PA · Next race 12 Jun 2027
Racers lovePoint-to-point 113.5 km (70.5 mi) along the Laurel Highlands Hiking Trail, held since 1980.
Watch outRocks, roots and boulders throughout; the first 31 km (19 mi) are the roughest.
- Distance
- 70.5 mi (114 km)
- Course
- Point to point
- Footing
- Technical
- Cutoff
- 22 hours
- Finish rate
- 63%
- Field
- about 210
66. Hyner View Trail Challenge 50K
Overall score 2.8Moderate evidence, 8 sources
Hyner, PA
Next race 17 Apr 2027
Mountain race
Racers love Five major climbs and about 1,981 m (6,500 ft) of gain in 50 km (31 mi), with Susquehanna views
66. Hyner View Trail Challenge 50K
Overall score 2.8GoodModerate evidence · 8 sourcesBottom 8%Hyner, PA · Next race 17 Apr 2027
Racers loveFive major climbs and about 1,981 m (6,500 ft) of gain in 50 km (31 mi), with Susquehanna views
Watch outHard cutoffs: mile 7.5 (12.1 km) 10:30 am, 17 (27.4 km) 1:00 pm, 25 (40.2 km) 3:15 pm
- Distance
- 50 km (31 mi)
- Course
- One big loop
- Climbing
- Mountain, 209 ft/mi (40 m/km)
- Footing
- Technical
- Cutoff
- 10 hours
- Field
- about 500
67. Manitou's Revenge 54 Mile
Overall score 2.7Moderate evidence, 9 sources
Windham, NY
Next race 19 Jun 2027
Mountain race
“best I have seen at any race” HMRRC Pace Setter (Bill Hoffman)
67. Manitou's Revenge 54 Mile
Overall score 2.7GoodModerate evidence · 9 sourcesBottom 7%Windham, NY · Next race 19 Jun 2027
Racers loveEscarpment Trail and Devil's Path summits on an 85.6 km (53 mi) point-to-point from Windham to Phoenicia.
Watch outLongest aid gap is 16.1 km (10 mi), and the race warns of 3 to 4 h between stations.
“best I have seen at any race” HMRRC Pace Setter (Bill Hoffman)
- Distance
- 53.2 mi (85.6 km)
- Course
- Point to point
- Climbing
- Mountain, 282 ft/mi (53 m/km)
- Footing
- Very technical
- Cutoff
- 23 hours
- Finish rate
- 83%
- Field
- about 125
- 100 mi
68. Oil Creek 100 Trail Runs (100 Mile)
Overall score 2.7Moderate evidence, 5 sources
Titusville, PA
Last race 10 Oct 2026
Lapped course
“Unforgiving. Historic. Gnarly.” Oil Creek 100 race, Oil Creek 100 official results and records
68. Oil Creek 100 Trail Runs (100 Mile)
Overall score 2.7GoodModerate evidence · 5 sourcesBottom 6%Titusville, PA · Last race 10 Oct 2026
Racers loveThree 50.1 km (31.1 mi) loops from one base, plus a 12.4 km (7.7 mi) finish loop.
Watch out5,420 m (17,785 ft) of gain on rugged single track with house-sized rocks.
“Unforgiving. Historic. Gnarly.” Oil Creek 100 race, Oil Creek 100 official results and records
- Distance
- 100.6 mi (162 km)
- Course
- Loop course
- Climbing
- Hilly, 177 ft/mi (34 m/km)
- Footing
- Moderate
- Cutoff
- 32 hours
- Finish rate
- 55%
- 100 mi
69. The Canyons Endurance Runs by UTMB 100 Mile
Overall score 2.7Moderate evidence, 8 sources
Auburn, CA
Next race 23 Apr 2027
Point to point, hilly · 35 hours
“Ultra endurance races are truly a team sport.” Deep Think Endurance (Jade Graham)
69. The Canyons Endurance Runs by UTMB 100 Mile
Overall score 2.7GoodModerate evidence · 8 sourcesBottom 4%Auburn, CA · Next race 23 Apr 2027
Racers loveRuns on much of the Western States Trail from China Wall to downtown Auburn
Watch outFirst cutoff is 18:30 Friday at 25 km (mile 15.8), then 19:45 at Michigan Bluff, 36 km (mile 22.6)
“Ultra endurance races are truly a team sport.” Deep Think Endurance (Jade Graham)
- Distance
- 100.3 mi (161 km)
- Course
- Point to point
- Climbing
- Hilly, 182 ft/mi (34 m/km)
- Footing
- Moderate
- Cutoff
- 35 hours
- Finish rate
- 64%
70. Dead Horse Ultra 50 Mile
Overall score 2.5Thin evidence, 2 sources
Moab, UT
Next race 14 Nov 2026
rolling · 12.8 hours
Racers love Both distance-matched writers praise the red-rock scenery.
70. Dead Horse Ultra 50 Mile
Overall score 2.5GoodThin evidence · 2 sourcesMoab, UT · Next race 14 Nov 2026
Racers loveBoth distance-matched writers praise the red-rock scenery.
Watch outRecent feedback criticizes fueling, volunteer support, traffic and the finish experience.
- Distance
- 50 mi (80.5 km)
- Climbing
- Rolling, 98 ft/mi (19 m/km)
- Footing
- Moderate
- Cutoff
- 12.8 hours
71. MIUT Legend
Overall score 2.5Thin evidence, 4 sources
Porto Moniz to Machico, Portugal
Next race 24 Apr 2027
Mountain race
Racers love Island crossing from Porto Moniz to Machico
71. MIUT Legend
Overall score 2.5GoodThin evidence · 4 sourcesPorto Moniz to Machico, Portugal · Next race 24 Apr 2027
Racers loveIsland crossing from Porto Moniz to Machico
Watch outVery steep, slippery stairs and descents
- Distance
- 110 km (68.4 mi)
- Course
- Point to point
- Climbing
- Mountain, 346 ft/mi (66 m/km)
- Footing
- Very technical
- Cutoff
- 32 hours
- Field
- about 1,000
Not yet rated 321
No Moku score yet. Dates and details come from each race's official page, with any race reports we have read.
The 5th Annual Mackyard Ultra presented by Baltimore Road Runners Club
Not yet rated1 feedback sourceCockeysville, MD
Next race 31 Oct 2026
The 5th Annual Mackyard Ultra presented by Baltimore Road Runners Club
Not yet rated1 feedback sourceCockeysville, MD · Next race 31 Oct 2026
- Also on the day
- Marathon
Goblin Valley Trail Runs
Not yet rated1 feedback sourceGreen River, UT
Next race 7 Nov 2026
Half marathon (13.1 miles) · Marathon
- Also on the day
- Half marathon (13.1 miles) · Marathon
Lake Chabot Trail Run
Not yet rated1 feedback sourceCastro Valley, CA
Next race 7 Nov 2026
Half marathon (13.1 miles) · Marathon
- Also on the day
- Half marathon (13.1 miles) · Marathon
Ponderosa Polar Challenge 2026
Not yet rated1 feedback sourceOrderville, UT
Next race 7 Nov 2026
Marathon
- Also on the day
- Marathon
RYR Endurance Race Weekend
Not yet rated1 feedback sourceOwensboro, KY
Next race 14 Nov 2026
Half marathon (13.1 miles) · Marathon
- Also on the day
- Half marathon (13.1 miles) · Marathon
Roxbury Fall Classic
Not yet rated1 feedback sourceRoxbury, CT
Next race 14 Nov 2026
Half marathon (13.1 miles) · Marathon
- Also on the day
- Half marathon (13.1 miles) · Marathon
2026 Seattle Ghost Marathon, Half & 50K
Not yet rated1 feedback sourceSeattle, WA
Next race 28 Nov 2026
Half marathon (13.1 miles) · Marathon
2026 Seattle Ghost Marathon, Half & 50K
Not yet rated1 feedback sourceSeattle, WA · Next race 28 Nov 2026
- Also on the day
- Half marathon (13.1 miles) · Marathon
Brazos Bend 100
Not yet rated1 feedback sourceNeedville, TX
Next race 5 Dec 2026
Half marathon (13.1 miles) · Marathon
- Also on the day
- Half marathon (13.1 miles) · Marathon
Crooked Creek Ultra Trail Race
Not yet rated1 feedback sourceShepherdsville, KY
Next race 5 Dec 2026
Half marathon (13.1 miles) · Marathon
Crooked Creek Ultra Trail Race
Not yet rated1 feedback sourceShepherdsville, KY · Next race 5 Dec 2026
- Also on the day
- Half marathon (13.1 miles) · Marathon
Run the River Ultra
Not yet rated1 feedback sourceWilliamsburg, VA
Next race 5 Dec 2026
Half marathon (13.1 miles)
- Also on the day
- Half marathon (13.1 miles)
About these ratings
Races are scored out of 5 on the race, support, course, conditions, cutoffs and travel. 5 is always the better end. How we rate ultras
Footing, climbing and loop or point to point are shown as course traits, not scored, because runners want different things. Filter by them to find your kind of race. Cutoffs and distances come from each race's official site, with the edition we checked on every page.
453 racer reviews and race reports behind the scores.
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