Mountain Lakes 100

SEP
19
2026
Mountain Lakes 100 is a scenic 100-mile trail run starting at Olallie Lake, featuring 60 miles on the Pacific Crest Trail. All runners must complete a trail work requirement. It's a Western States qualifier with a field of 150.
Sat 19 Sep 2026
100 miles

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Mountain Lakes 100 Event Details

The Mountain Lakes 100 is a 100-mile trail running event that starts and finishes at Olallie Lake in Oregon. The course runs along dozens of lakes and includes technical and rocky sections, views of mountain peaks, and about 60 miles on the Pacific Crest Trail. The race is described as highly scenic.

Registration for the event is not a lottery. The race is a Western States 100 qualifier. The total runner capacity is 150. There is a trail work requirement for all participants; runners must complete 8 hours of trail work between October 1 of the year before the race and September 1 of the race year.

The event is produced by Go Beyond Racing, which organizes over three dozen trail races each year. The organizer states that their races are highly organized with a focus on safety, donate to a beneficiary, and aim to reduce environmental impact. Visit the organization's website for the most recent information.

100 mi
100 Miler