Waldo 100K Trail Run
Eugene, OR
- 100K
- Trail (Unpaved)
- Official race website
The Waldo 100K Ultramarathon is a challenging 100K loop-type course starting at Willamette Pass Ski Area (70 miles east of Eugene, Oregon) at elevation 5120′, climbing up several mountains including Fuji, The Twins, and Maiden Peak before returning to the ski area. The route is mostly single-track trails with some … MORE
Local Historical Weather (Aug 01):
| 2025 | 2024 | 2023 | 2022 | 2021 | |
| H (°F) | 88 | 98 | 89 | 84 | 94 |
| L (°F) | 57 | 61 | 51 | 63 | 58 |
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Best race support ever!
This was my first 100k, having only completed a couple of 50k races in preparation. Needless to say, the Waldo was the biggest race challenge I had faced up until … MORE
This was my first 100k, having only completed a couple of 50k races in preparation. Needless to say, the Waldo was the biggest race challenge I had faced up until this point. But the scenery was incredible and I cannot overemphasize how supportive and enthusiastic the volunteers are for this event. The personal congratulations from the race director was a special touch that I hadn’t expected. I am so happy that Waldo was my first 100k because the positive experience got me hooked on the longer distance ultras.
Finish line puke(my Kyle Pietari moment)
Race almost canceled due to smoke from nearby fires. Beautiful tough course with peak bagging three different 7000+footers (Fuji Mt, the Twins peak, Maiden Peak) and over 11000 feet of … MORE
Race almost canceled due to smoke from nearby fires. Beautiful tough course with peak bagging three different 7000+footers (Fuji Mt, the Twins peak, Maiden Peak) and over 11000 feet of climbing and some PCT time. Was great through 50k then stomach went south and tough to keep up calories and couldn’t run with any conviction. Power hiking was strong though. Race itself was well organized and marked. Good pre and post race events at Willamette Pass Ski Area.