Mill Valley
Trail Running Calendar near Mill Valley 2026-2027
Explore the top trail runs near Mill Valley for 2026-2027! We've gathered 54 exciting trail runs in the area. Check out our detailed list below to find your next local trail run.
September 2026
Family friendly 5K on September 20, 2026 in San Francisco with a scenic 3.4 mile course, race t-shirts, post race festivities and age based awards.
Trail 5K at San Pedro Park with a hilly, technical first mile; a kids run and a members only picnic follow.
Historic Bay Area trail event offering 100K, 50 mile and marathon courses, all UTMB indexed with the 50 mile in the Pacific USATF Grand Prix.
October 2026
A three day weekend at McNear’s Beach Park combining an Olympic distance triathlon, a trail half marathon, a kids fun event, and a combined challenge.
Experience a trail half marathon on San Bruno Mountain featuring 2,400 feet of elevation gain and stunning views. Enjoy a scenic route with 93 percent trail coverage followed by a post race meal and finishers medal.
Off road 5K on San Bruno Mountain with about 300 ft elevation gain, starting and finishing at the picnic area and routing via Old Guadalupe Trail and Saddle Loop Trail.
PA-USATF cross-country races at China Camp State Park on Oct 11, 2026, with a roughly 4.25 mile rolling single track course and three race divisions.
Trail races in Walnut Creek on October 17, 2026 with distances from 5K to 30K; walkers welcome and courses may include mud and creek crossings.
Scenic trail half in the Marin Headlands: 13.6 miles, 2,156 ft climbing, four aid stations, childcare grants, training support, and a $25,000 prize purse.
Cross-country meet at Radke Martinez Regional Shoreline on October 24, 2026, with three approximately 4.1 mile races over grass, dirt, and path surfaces.
Virtual worldwide challenge and an in-person gathering at the San Francisco Ferry Building on October 24, 2026, fundraising for the Breast Cancer Research Foundation.
November 2026
A fundraiser in Joaquin Miller Park featuring a 5 km trail race and a 1 mile fun run to support Oakland Tech PTSA and student programs.
Experience a scenic trail run around the Lake Chabot reservoir and hills. With distances from a 50 yard kids dash to a 50K ultramarathon there is an option for everyone at this Castro Valley event.
Trail races from 10K to 50K around Mt Tamalpais, held at Stinson Beach with technical trails, significant climb, cupless aid stations, and chip timing.
A Thanksgiving Day 5K and 1 mile event at San Leandro Marina with canicross teams, kids races, and proceeds benefiting animal welfare; the course is flat with mixed surfaces and free parking is available.