Mountain Lakes 100
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Mountain Lakes 100
Mountain Lakes 100 is a 100 mile trail race at Olallie Lake, Oregon, held on September 18, 2027. The race starts and finishes at Olallie Lake and runs along dozens of lakes in the surrounding area.
The course includes technical and rocky trail sections, views of mountain peaks in multiple directions, and approximately 60 miles on the Pacific Crest Trail. The course is supported with staffed aid stations and volunteer support along the route.
The event is produced by Go Beyond Racing and has a capacity of 150 runners. Registration is not a lottery, and the race is a Western States 100 qualifier. Registration opens December 6, 2026 at 7:00 AM PT.
There is a required trail work contribution: all runners must complete 8 hours of trail work between October 1 of the previous year and September 1 of the race year. Runners who do not submit the required hours will forfeit their spot. The trail work requirement also applies to those on the wait list. Organizers have historically cleared the wait list by the beginning of September in recent years.
Cancellation policy: cancellations more than 30 days before the race receive a 50 percent credit toward a future Go Beyond Racing event, valid for 365 days and not transferable. Cancellations 30 days or less before the race receive no credit or refund. Visit the organization's website for the most recent information.