Mt. Tam Trail Run
Stinson Beach, United States • 8 Nov 2025
Event information
The Mt. Tam Trail Run takes place at Stinson Beach, Mt. Tamalpais State Park, on November 8, 2025. The event offers four distances: 50K, 30K, Half Marathon, and 10K. The event capacity is 500 runners across all distances; the event is sold out and a waitlist is available. Chip timing is used with disposable chips attached to the back of each bib. Parking is available within the Stinson Beach Day Use Area and is free of charge. There is an 8.5 hour time limit for the 50K and 30K; all runners must be off course by 4:00 PM. Early bib pick-up is available the Friday before the race at San Francisco Running Company in Mill Valley; race morning check-in is also provided.
Course, aid, and awards
- 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
The course is mostly technical dirt trails and non-technical fire roads; hiking poles are permitted. The event is cupless: aid stations will not provide disposable cups and runners must carry their own water bottle or reusable cup. Aid stations provide a variety of foods and drinks (water, Skratch Hydration, soda, PB&J, fruit, snacks) and basic first aid items. Drop bag service is not available. Awards include trophies for the top three overall finishers for each distance, finisher medals for all, a pint glass for 50K finishers, and a cash prize purse for the 50K top three (1st $300, 2nd $200, 3rd $100). Visit the organization's website for the most recent information.