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Mt. Tam Trail Run

Stinson Beach, United States • 8 Nov 2025

Mt. Tam Trail Run : November 2025

The Mt. Tam Trail Run is an inside-trail racing event held at Stinson Beach and Mt. Tamalpais State Park in Marin County, California. The event offers multiple trail distances and has a total capacity of 500 runners. The race is currently sold out and a waitlist is available; the waitlist closes on November 5, 2025.

Distances

  • 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

Course, aid stations, and race details

Most of the courses use technical dirt trails and non-technical fire roads with long, steep hills. Hiking poles are permitted. Courses are marked with colored ribbon, laminated signs, and ground arrows; blue ribbons indicate wrong-way trails. Printable course maps, turn-by-turn directions, aid station cutoffs, and elevation profiles are provided.

Aid stations offer a variety of foods and beverages (for example, chews, Stroopwafels, trail mix, potato chips, PB&J, Coke, ginger ale, water, and Skratch Hydration). Gu energy gels are not permitted at aid stations on GGNRA property such as Muir Beach. This is a cupless event; runners must carry their own bottle or reusable cup and drop bag service is not available. There is an 8.5 hour time limit for the 50K and 30K. Parking is available in the Stinson Beach Day Use Area and is free. The 50K has a cash prize purse for overall top three (1st $300, 2nd $200, 3rd $100). All finishers receive a custom medal; 50K finishers also receive a pint glass. Visit the organization's website for the most recent information.

United States California Stinson Beach

Race information

Website Registration
50 km
50k
30 km
30k
21 km
1/2 Marathon
10 km
10k
Visit the organization's website for the most recent information.
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