Waldo 100K
Willamette Pass, United States • 1 Aug 2026
Event
The Waldo 100K Ultramarathon is scheduled for August 1, 2026 in Oakridge, Oregon. The event distance is 100K and it is run as a loop course that starts and finishes at Willamette Pass Ski Area. The ski area elevation is 5,120 feet. The course is not described as a beginner race and participants are expected to have prior experience.
Course, entry and programs
The route uses mostly single-track trails with some fairly remote sections. The course climbs multiple named peaks, including Fuji, The Twins, and Maiden Peak, and passes areas with views of Waldo Lake. Lottery registration for the race is open January 1 through January 21, 2026, with the lottery conducted on January 22. The event participates in a Trail to Zero carbon offset program; lottery registrants are offered the option to contribute one dollar or more to support a climate-action offset for participant travel. The location is approximately 70 miles east of Eugene, Oregon. Visit the organization's website for the most recent information.