Mt. Tam Trail Run

Mt. Tam Trail Run

The Mt. Tam Trail Run is a trail race hosted in Stinson Beach, California and organized by Inside Trail Racing. The course starts at Stinson Beach, ascends to viewpoints on Mt. Tamalpais, and returns via trails through the Headlands back to the beach. The event offers multiple distances and a total race capacity of 500 entrants across all distances.

Available distances:

• 50K
• 30K
• Half Marathon
• 10K

Aid stations are stocked with a variety of foods and beverages including energy gels and chews, Stroopwafels, trail mix, pretzels, boiled potatoes with salt, soft drinks, water, Skratch Hydration mix, pickles, sandwiches, fruit, and basic first aid items. Runners are advised to carry at least one 20 oz bottle due to varying distances between aid stations. The 50K has an 8.5 hour time limit.

Awards include custom trophies for the top three overall finishers by gender in each distance, age-group medals three deep across multiple age categories including non-binary, a prize purse for the top three overall in the 50K, finishers medals for all, and a pint glass for all 50K finishers. Race shirts use a tri-blend performance fabric and registration by October 24, 2026 is required to guarantee shirt availability and size. Parking is available in the Stinson Beach Day Use Area at no charge. Entry fees are non-refundable; a partial credit policy applies for cancellations made at least three weeks before the race. Visit the organization's website for the most recent information.