Mt. Tam Trail Run
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Mt. Tam Trail Run, Stinson Beach
The Mt. Tam Trail Run is a trail running event on November 7, 2026 at Mt. Tamalpais State Park, starting and finishing at Stinson Beach, CA. The event offers four distances with large elevation gains and a total event capacity of 500 runners. Registration opens May 27, 2026.
Distances offered
- 50K : 30.0 miles, 6,000′ elevation gain
- 30K : 18.5 miles, 3,900′ elevation gain
- Half Marathon : 13.0 miles, 2,800′ elevation gain
- 10K : 6.8 miles, 1,600′ elevation gain
Most of the course runs on technical dirt trails and non-technical fire roads. The route climbs from the beach to viewpoints on Mt. Tam and returns via trails in the Headlands to the beach. Courses are marked with colored ribbon, laminated signs, and occasional flour arrows; blue ribbon indicates wrong way.
Aid stations provide a variety of food and drink, electrolyte mixes, and basic first aid items. This is a cupless event; runners must carry their own water bottle or reusable cup. Gu Energy gels are restricted in certain park locations and there are specific disposal rules at some aid stations. Drop bag services are not available. The 50K and 30K have an 8.5 hour time limit.
Timing is chip based using MyLaps and Race Director with disposable chips attached to each bib. Awards include overall and age-group prizes, finisher medals, and a pint glass for 50K finishers. Volunteer roles are available and include a shirt and food. Visit the organization's website for the most recent information.
