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Mt. Tam Wild Boar Half Marathon

Mill Valley, United States • 25 Apr 2026

The Mt. Tam Wild Boar Half Marathon & 10K is an annual trail running event held at Mt. Tamalpais State Park in Mill Valley, California.

Celebrating its 38th year, the race features a scenic coastal ridge course combining paved roads and single-track dirt trails with stunning views of the Pacific Ocean, Bolinas Lagoon, and Marin County watershed. The half marathon follows Ridgecrest Blvd. and Coastal Trail, while the 10K turns back earlier along the Coastal Trail.

Limited to 300 participants, the event offers aid stations, participant t-shirts, and medals for half marathon finishers. The course is marked for safety, and headphones are prohibited to ensure runner awareness on narrow trails. Visit the organization's website for the most recent information.

United States California Mill Valley

Race information

Registration
13 mi
Half Marathon
10 km
10k
Visit the organization's website for the most recent information.
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