
Mountain Lakes 100
Olallie Lake, OR • September 20, 2026
This truly is the most beautiful Oregon 100 miler. The course is on the iconic Pacific Crest Trail and features the best trail running the Pacific Northwest has to offer – technical and rocky sections, lots of views of mountain peaks and lakes, and plenty of luscious of single track. You’ll run between two Cascade mountains; Mt. Jefferson and Mt. Hood, and experience outstanding on-course support while making the journey to the finish line. There is 11,700′ of gain and loss at Mountain Lakes 100. Check out the Course page for the route. We acknowledge and respect that this race occurs on the traditional homelands of the Molalla Tribe, Tenino Tribe, and the Confederated Tribes of the Warm Springs.
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