Mill Valley
Trail Running Calendar near Mill Valley 2026-2027
Explore the top trail runs near Mill Valley for 2026-2027! We've gathered 53 exciting trail runs in the area. Check out our detailed list below to find your next local trail run.
February 2027
Trail races at Lake Chabot Regional Park near Castro Valley with 50K, 30K, half marathon, 10K and 5K options, organized by Inside Trail Racing.
March 2027
A three day trail running weekend in Marin County offering a point to point 100K plus single loop 50K and 28K that summit Loma Alta and Big Rock Ridge.
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 event at Mount Diablo on April 3, 2027 offering 50K, half marathon (including a hiker option), 10K and 5K with proceeds benefiting Save Mount Diablo.
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.
May 2027
Trail running in the Stinson Beach and Muir Woods area with marathon, half marathon and 7 mile options. The event is organized by Enviro Sports and is tentatively scheduled for May 2027.
A race day in El Sobrante with a half marathon, 10K, 5K and a hiker division through the hills of Wilcat Canyon; registration windows and fees vary by distance.
June 2027
A point to point 100 mile trail race in Berkeley with 18,000 ft of climb, a 33 hour limit, and a capped field of 300; a Western States qualifier and UTMB Index race.
A historic 7.4 mile trail race from Mill Valley to Stinson Beach, known for steep stairs, a unique handicapping start system, and a limited field of about 1,500 runners.