Willamette Pass, Oregon · Held since 2002 · 101 km (62.5 mi) · 3,353 m (11,000 ft) gain
Race day Sat 7 Aug 2027
Footing and climbing are course traits: 5 is the smoother, flatter end, not a better race.
Watch out: Three intermediate cutoffs apply before the eighteen-hour finish limit. All 4
Every score is out of 5, and 5 is always the better end.
Top 29%. Better than 71% of the 61 races.
moderate6 sources behind this score: runner reviews and race reports. Moderate evidence is 5 to 9 separate sources.
Latest or next race
Sat 7 Aug 2027
Official race site(waldo100k.org, opens in a new tab)Moku Coach builds your plan around race day in August and this course.
Start free trialOverall score 3.6 out of 5
6 reviews and race reports
Tone of the reviews and race reports
6 reviews
Raced 2026 · Wandering Runner: Waldo highs and lows
The runner leads early but slows badly later, describing a difficult final mountain climb, limited water-carrying capacity and a lonely finish stretch. A volunteer pacer helps her finish; the account emphasizes pacing and self-sufficiency rather than a failure of race organization.
Covers Support, Course, Cutoffs
Read on wanderingrunner.com (Wandering Runner: Waldo highs and lows, opens in a new tab)Raced 2023 · On The Move: first Waldo finish
The first-time entrant enjoys supportive volunteers, crew stops and a themed aid station. A pre-race storm improves smoke and heat conditions, while blisters and the late mountain section make crew preparation and pacing important.
Covers Support, Course, Conditions
Read on amyjochamberlain.wixsite.com (On The Move: first Waldo finish, opens in a new tab)Raced 2021 · See. Rover(t). Run.: Waldo report
The runner enjoys cool conditions and runnable forest singletrack after concerns about wildfire smoke. Rocky summit terrain, the steep late climb and the need to carry supplies beyond the last drop bag are the main challenges.
Covers Support, Course, Conditions
Read on inspired2tri.blogspot.com (See. Rover(t). Run.: Waldo report, opens in a new tab)Raced 2017 · Trail Wisp: Waldo race report
The runner praises enthusiastic volunteers, helpful course marshals and a runnable forest route. Smoke limits the views, altitude makes sustained running harder, and rocky summit sections demand care.
Covers Support, Course, Conditions
Read on thwisp.wordpress.com (Trail Wisp: Waldo race report, opens in a new tab)Pick a score, then tell the next runner about the footing, cutoffs and aid stations.
Open a category for its ratings and the evidence behind them.
Very good. How runners feel about it, how well it is run, and the community around it. Counts for 25% of the overall score.
Toughness for its distance: Very tough
Several finishers praise the trail and community despite very demanding race days. · Medium confidence
Reports describe experienced volunteers and organized support. · Medium confidence
Themed aid stations, supportive volunteers and shared camping create a close community. · Medium confidence
Very good. Aid stations, crew access, drop bags and pacer rules. Counts for 25% of the overall score.
Experienced crews staff remote stations, but runners must carry supplies between them. · Medium confidence
Several crew points require rough roads or substantial hiking. · Medium confidence
Four named locations accept bags; the later mountain section has no bag access. · Medium confidence
Pacers may join at Charlton Lake and continue to the finish. · Medium confidence
Very good. Course marking, scenery, and how runners rate the trail itself. Counts for 15% of the overall score.
Runners praise staffed junctions; the organizer warns against expecting continuous assurance ribbons. · Medium confidence
Forest singletrack, mountain summits and lakes earn repeated praise when smoke permits views. · Medium confidence
Runners enjoy long forest descents and varied mountain terrain. · Medium confidence
Much of the trail is soft and runnable, but summits include rocks and uneven footing. · Medium confidence
Long runnable sections alternate with sustained uphill hiking. · Medium confidence
Long climbs accumulate throughout the route, including a difficult late summit. · Low confidence
Good. Race-day temperature and how predictable the weather is. Counts for 14% of the overall score.
Reports range from cool, pleasant running to hot and smoky conditions. · Low confidence
Wildfire smoke and mountain weather recur across editions. · Medium confidence
The official high point is 2,383 m (7,818 ft). · Medium confidence
Good. How generous the overall and intermediate cutoffs are for the terrain. Counts for 13% of the overall score.
The eighteen-hour limit still requires sustained progress over long mountain climbs. · Medium confidence
Three compulsory departures apply before the finish limit; check each against your pace. · Medium confidence
A prior trail-ultra finish is required, and the remote late section demands self-sufficiency. · Medium confidence
A lottery and recent trail-ultra qualification restrict entry. · Medium confidence
Very good. Getting there, places to stay, race-day logistics and value. Counts for 8% of the overall score.
The ski-area start requires a substantial road transfer. · Low confidence
On-site camping helps; nearby cabins and summer campsites need advance planning. · Medium confidence
One start and finish simplify logistics, but crews must plan remote access carefully. · Medium confidence
Runners appreciate camping and volunteer support; the next entry fee is still unannounced. · Low confidence
One big loop
Leave aid stations before their cutoff. Finisher-hat cutoff is 22:00, eighteen hours after the current start. Older reports describe different limits.
| Checkpoint | Distance | Cutoff |
|---|---|---|
| Charlton Lake, 32 mi (51.5 km)52 km (32 mi) | 52 km (32 mi) | 14:00 clock, 10:00 elapsed |
| Rd. 4290, 37.2 mi (59.9 km)60 km (37 mi) | 60 km (37 mi) | 15:15 clock, 11:15 elapsed |
| The Twins, 44.7 mi (71.9 km)72 km (45 mi) | 72 km (45 mi) | 17:30 clock, 13:30 elapsed |
Closest on distance, course shape, climbing, footing, region and season.
Overall score 4.7Olympic Valley, CA
Point to point or one big loop · Similar climbing · Similar footing
Overall score 2.7Auburn, CA
Point to point or one big loop · Similar climbing · Also on the West Coast
Overall score 2.9Natural Bridge Station, VA
Also 100K · Point to point or one big loop · Similar climbing
Checked against the 2026 course and aid rules; 2027 registration edition on the official race site. Rules change, so confirm before you enter.
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