2 running and ultra events in Mill Valley, California

From big races to Saturday morning group runs—find running and ultra events and connect with the local endurance sports community.

• 2026 Mt. Tam Wild Boar Half Marathon & 10K [envirosports.com] [Register at raceroster.com]
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  Sat, Apr 25, 2026 at 8:00 AM

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  It doesn't get much better than this coastal ridge trail run. Enjoy the rolling single-track high up on Mt. Tam with views of the Pacific Ocean below. You will follow a combination of paved roadways...

  It doesn't get much better than this coastal ridge trail run. Enjoy the rolling single-track high up on Mt. Tam with views of the Pacific Ocean below. You will follow a combination of paved roadways and dirt single-track 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!

  10k 21k Half Marathon Run Trail

  Mt Tamalpais State Park, Tamalpais Ave, Mill Valley, California, United States
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