Ultramarathons at a glance
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Where the races are
70 shown
North America has the most, 57 of the 70 shown
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70 of 70 have this recorded.
Season
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N. America: 4 in 10 races fall in June to August
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Top rated
See all 70 on the index1. Umstead 100 Mile Endurance Run
Overall score 4.9ExcellentModerate evidence · 8 sources
Raleigh, NC
Next race 3 Apr 2027
“Umstead was nearly a perfect race.” Devon Yanko, Chaski blog
Loop course, rolling · 30 hours
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 4.8ExcellentStrong evidence · 10 sources
Brookline, NH
Last race 17 Oct 2026
“Halloween party disguised as a race” Lila Gaudrault, Substack
Timed loop · 30 hours
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 4.8ExcellentModerate evidence · 8 sources
Olympic Valley, CA
Next race 26 Jun 2027
“The heat and effort were real.” Dan Jones, Daniel Jones, Substack
Point to point, hilly · 30 hours
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 4.7ExcellentModerate evidence · 9 sources
Huntsville, TX
Next race 6 Feb 2027
“There is no such thing as an 'easy' 100 miler.” I Run Alaska (Brandon)
Loop course, rolling · 32 hours
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 4.4Very goodModerate evidence · 9 sources
Bandera, TX
Next race 9 Jan 2027
“Mt. Dew comes straight from heaven.” Rick H, Team RunRun
Loop course, rolling · 25 hours
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 4.3Very goodModerate evidence · 9 sources
Pietermaritzburg / Durban, South Africa
Next race 13 Jun 2027
“hundreds of runners missing out on a medal” Stuart Mann, The Running Mann
Point to point · 12 hours
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 4.1Very goodModerate evidence · 8 sources
Mayer, AZ
Next race 13 Feb 2027
“Black Canyon 100K is a tricky course to pace.” Team Run Run, Dandelion Dilluvio-Scott
Point to point, rolling · 20 hours
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 4.1Very goodStrong evidence · 10 sources
Heflin to Sylacauga, AL
Next race 7 Nov 2026
“Where are the real mountains?” Dan Thomas, TeamRunRun
Point to point, hilly · 32 hours
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 4.1Very goodModerate evidence · 9 sources
Albion, IN
Last race 10 Oct 2026
“Be prepared for mud, wet, and cold!” Dave S (Scheibel), Team RunRun (Dave S)
Loop course, rolling · 30 hours
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 4.0Very goodModerate evidence · 9 sources
Bell Buckle, TN
Last race 17 Oct 2026
Racers love The world championship of the format: one 6,706 m (4.167 mi) yard every hour until one runner is left.
Backyard format
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 4.0Very goodThin evidence · 3 sources
Rockingham, NC
Next race 25 Sep 2027
“Completing the same loop 42 times may sound boring but it really wasn't.” RaceRaves (reviewer missmac17224)
Timed loop · 24 hours
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 3.9Very goodModerate evidence · 8 sources
Black Canyon City to Flagstaff, AZ
Next race 2 May 2027
“the wheels were off the bus” Des Clarke, Team RunRun
Point to point, hilly · 125 hours
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
