Mammoth Bar Trail Runs

The Mammoth Bar Trail Runs, held in Auburn, California's Auburn State Recreation Area, offer challenging trail races on September 7, 2025. Participants can choose from a Half Marathon, 10K, or 5K, all set on the single-track and double-track trails of the Mammoth Bar OHV Area. Known for its steep climbs and descents, the course provides significant elevation gain ("Mammoth vert") and stunning views of the American River Canyon.

This event, organized by Skybreaker Racing under Singletrack Running, promises a demanding and scenic trail running experience in the "Endurance Capital" of Auburn. Visit the organization's website for the most recent information.