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Waldo 100K Trail Run

Aug 01, 2026 at 5:00 AM

Willamette Pass Ski Area, Willamette Pass OR, , USA

ATRA race member Feature this race

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 fairly remote sections and has many incredible views of pristine Waldo Lake. It is not a beginner-level ultra and participation in the race should not be taken lightly.

4 qualifying points for Ultra-Trail du Mont-Blanc®

A Western States® 100-Mile Endurance Run Qualifier

Waldo Ultras is a 501(c)(3) non-profit corporation that conducts the Waldo 100K which operates under a special use permit with Willamette and Deschutes National Forests, and is an equal opportunity outdoor recreation service provider.

Event History

2026
Aug 01, 2026
2025
Aug 02, 2025
2024
Aug 03, 2024
2023
Aug 05, 2023View Results →
2022
Aug 13, 2022View Results →
2021
Aug 21, 2021View Results →
2020
Aug 22, 2020
2019
Aug 17, 2019View Results →
2018
Aug 18, 2018View Results →
2017
Aug 19, 2017View Results →
2016
Aug 20, 2016
2015
Aug 22, 2015
2014
Aug 16, 2014
2013
Aug 17, 2013
2012
Aug 18, 2012
2011
Aug 20, 2011
2010
Aug 21, 2010
2009
Aug 22, 2009
2008
Aug 16, 2008
2007
Aug 18, 2007
2006
Aug 19, 2006
2005
Aug 21, 2005
2004
Aug 21, 2004
2003
Aug 16, 2003
2002
Sep 28, 2002

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