Waldo 100K
Waldo 100K is a remote Oregon mountain loop over Fuji, the Twins and Maiden Peak, combining high-country singletrack with a 20-hour limit each summer.
Quick facts
- Remote 100-kilometre mountain loop
- Fuji, Twins and Maiden Peak route
- Western States qualifying race
About the Waldo 100K
Waldo is an established 100K trail race centered near Oakridge and Willamette Pass. Its field, course and results history are dedicated to the 100K rather than a mixed-distance festival.
Course
The mountain loop climbs roughly 11,000 feet across Fuji, the Twins and Maiden Peak before returning to Willamette Pass. Remote singletrack and sustained climbing define the effort.
Race-day weather
Early August can bring heat, cold mountain mornings, smoke or thunderstorms. Exposed peaks and long forest sections may feel very different over the course of the day.
Past Waldo 100K dates and results
| Year | Date | Status | Results |
|---|---|---|---|
| 2027 | Saturday, August 7, 2027 | Upcoming | — |
| 2026 | Saturday, August 1, 2026 | Results available | Open results |
| 2025 | — | Results available | Open results |
Waldo 100K FAQ
When is the Waldo 100K?
The 2027 Waldo 100K is on Saturday, August 7, 2027.
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