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Trail Running calendar near Fairfax 2026-2027

We have found 103 Trailruns within 80 miles of Fairfax. See below where and when you can find the races.

Napa Wilderness Trail Runs

Napa - 26 mi from Fairfax

Trail runs at Skyline Wilderness Park near Napa feature four distances from about 6 to 32 miles with significant elevation. The cupless courses include spaced aid stations, a long water only stretch on the longer routes, and on site parking..

Rim Rock 50 Mile Trail Challenge

Napa - 26 mi from Fairfax

A trail ultramarathon at Skyline Wilderness Park on May 15, 2027, featuring a solo ~51-mile 2.5-loop course and a one-loop ~25-mile option. Cupless aid stations, specified crew and pacer rules, drop bag service, on-course nutrition, and pos..

Run for Amma

Los Gatos - 62 mi from Fairfax

A charity trail event at Skyline Ridge Open Space Preserve in Los Gatos offering 50K, 30K and 10K courses, with 100% of registration proceeds donated to a UCSF cancer research lab.

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