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.
August 2026
A limited-field island race on August 29, 2026 featuring a scenic half marathon and 10K circling Angel Island with ferry access and medals for half finishers.
A community run, hike and walk in San Anselmo on August 29, 2026 covering 4.75 miles up and down Bald Hill with a finish party at Imagination Park.
A waterfront 5K through Crissy Field and Fort Point Promenade in San Francisco on August 30, 2026, with live and virtual entry options and advance registration required.
September 2026
Monthly Richmond meetups offering a community hike plus an optional trail-run option, organized by FIERCE Advocates with Moving Forward and Richmond Run Club.
Trail and virtual races at China Camp State Park on September 13 2026 offering Half Marathon, 10K and 5K with a finish-line party and event swag.
A 40th edition cross country meet in Golden Gate Park with an approximately 4 mile two loop course over grass, dirt, and rolling hills.
Family friendly Jog in the Fog 5K in San Francisco with a scenic 3.4 mile course, post race activities, age group awards, and a race t shirt for registrants.
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 weekend of Olympic-distance triathlon, an Olympic relay, a trail half marathon and a kids fun event at McNear’s Beach Park in San Rafael.
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.
October 10 2026 trail races at San Pablo and Briones Reservoirs in Orinda CA featuring 35K, half marathon, 10K and 5K on single-track and fire roads.
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 Oct 24, 2026 featuring three 4.1 mile races over grass, dirt, and path; online registration closes Oct 23.
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.