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Rim Rock 50 Mile Trail Challenge

Napa, United States • 16 May 2026

The Rim Rock 50 Mile Trail Challenge is an inaugural ultramarathon set for May 16, 2026, in Napa Valley, California. Starting at Skyline Wilderness Park, the race covers approximately 50 miles through rugged, scenic trails including the Napa Open Space Preserve and the newly opened Suscol Headwaters Trail System. The course features two challenging loops showcasing oak forests, wild hills, and expansive valley views.

Participants can run solo or as part of a two-person relay. The event emphasizes environmental stewardship with a cupless race policy and offers camping, aid stations, and post-race meals. It celebrates the natural beauty and community spirit of the Bay Area trail running scene. Visit the organization's website for the most recent information.

United States California Napa

Race information

Registration Facebook
50 mi
50 Mile Relay
50 mi
50 Mile Solo
Visit the organization's website for the most recent information.
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