Mt. Tam Wild Boar Half Marathon & 10K Mill Valley, CA   Apr 25, 2026

It doesn’t get much better than this coastal ridge trail run. Enjoy the rolling singletrack high up on Mt. Tam with views of the Pacific Ocean below. You will follow a combination of paved roadways and dirt singletrack trails offering striking views of Bolinas Lagoon, the Pacific Ocean and Marin County watershed. From the start at Rock Springs, the course follows Ridgecrest Blvd. along the spine of Bolinas Ridge separating East and West Marin County. 10K runners will take a left at Willow Camp Trail and head back to Rock Springs along the Coastal Trail. The Half Marathon course continues along Ridgecrest Blvd. to Bolinas/Fairfax Road and also returns via the Coastal Trail. The event is limited to 300 participants so don’t wait too long to register!