Mill Valley
Trail Running Calendar near Mill Valley 2026-2027
Explore the top trail runs near Mill Valley for 2026-2027! We've gathered 52 exciting trail runs in the area. Check out our detailed list below to find your next local trail run.
December 2026
A memorial 5K on Baker Beach honoring a longtime DSE member, featuring a mixed surface course with a wooden bridge and parking at the upper lot.
Youth focused event in Oakland with a 1 mile kids fun run and a 5K trail run at Joaquin Miller Park, with limited parking and packet pickup before the race.
New Year's Eve at Lake Chabot in Castro Valley offers trail races on December 31, 2026, with a half marathon, 10K and 5K; walkers and hikers are welcome and free photos are provided.
January 2027
Multi-distance trail races at Lake Chabot across New Year's Eve and New Year's Day, including 5K, 10K, a half marathon and a virtual option.
Trail running weekend in San Francisco that crosses the Golden Gate Bridge and runs through the Marin Headlands, with multiple race distances and spectator access.
February 2027
Trail races from 5K to 50K through eucalyptus forests and lakeside trails at Lake Chabot Regional Park near Castro Valley, CA.
March 2027
Three-day trail running event in Marin County on March 19, 20 and 21, 2027 offering 28K, 50K and a point to point 100K with ridge summits and on-course support.
Multiple trail distances run through Redwood Regional Park on March 20, 2027 at Chabot Space & Science Center. Routes use East Ridge, West Ridge, Stream and Bridle trails and distances were measured with a Rolatape surveyor's wheel.
April 2027
Trail running event near Mount Diablo on April 3, 2027 offering 50K, half marathon, 10K, 5K and remote options while supporting Save Mount Diablo.
Trail race in the Marin Headlands offering Marathon, Half Marathon and 10K with views of the Golden Gate Bridge and Pacific coastline.
A scenic loop race around Angel Island offering a 10K single loop and a half marathon of two loops with island ferry access and a 400-runner limit.
A trail event at Lake Chabot Regional Park offering distances from a 50‑yard kids dash to a 50K ultramarathon. The looped course circles the Lake Chabot reservoir and surrounding hills with measured distances.
Trail event at Mt Tamalpais State Park offering a Half Marathon and 10K on coastal ridge single track with ocean and lagoon views.