Trail Running calendar near Vacaville 2026-2027

Trail races at Rodeo Beach in the Marin Headlands offering 8K, half marathon, 30K and 50K on coastal singletrack and fire roads; chip timed, cupless, capacity 350.

A long running 50K and half marathon around Lake Chabot Marina and East Bay parks each August, with community staffed aid stations, downloadable course guides, and post race plant based food.

Run among towering redwoods in Oakland on August 15 at the Redwood Summer Trail Run, with distances from a 5 mile to an epic 50K plus a free kids dash. Expect stocked aid stations, finish medals and classic trail vibes.

A single loop 50K ultramarathon in Muir Beach, California on Saturday, August 15, 2026. The course uses notable Marin trails, includes about 6500 feet of elevation gain, and features coastal and Bay Area views.

An orienteering style 5K and 10K in San Francisco where solo runners or teams of up to five use a custom map to visit up to 30 checkpoints, answer simple multiple choice questions, and enjoy refreshments at the finish.

Trail run in Huddart Park near Woodside, California on August 30, 2026 offering distances from 8K to 50K plus a free kids 50 yard dash. Courses run on single track and dirt roads with aid stations every 5 to 9 miles.

Trail races at Mammoth Bar OHV Area in Auburn on September 6, 2026. Single-track and double-track courses include steep climbs, descents and views of the American River Canyon across Half Marathon and 10K options.

Diablo Trail Run on September 6, 2026 in Clayton CA offers distances from a 4 mile Mitchell Canyon course to a 50K, plus a free kids 50 yard dash for age six and younger. Courses use dirt roads and single track with aid stations every 3 to..

Trail races on September 12, 2026 in Tilden Regional Park and Wildcat Canyon offering 50K, 35K, half marathon and 10K courses with marked trails, aid stations every five to seven miles, and a cupless format requiring reusable cups or bottle..

Trail runs at Granite Beach, Folsom Lake SRA offering a 10 mile course and a 5K on shoreline and single-track trails, with aid stations, a finisher beer glass, and a postrace hot meal.

A multi distance trail event at Lake Chabot Regional Park in Castro Valley featuring a 100k, a 50 mile, and a marathon. All races are UTMB Index events and the 50 mile is part of the Pacific USATF Grand Prix.

Trail races at Sanborn County Park in the Santa Cruz Mountains offering 10K, half marathon, and 50K on soft singletrack through redwood forest with sustained climbs, flowy descents, and shuttle access from offsite parking.

Trail running event in Auburn, California on October 3, 2026 offering half marathon, 12K and 5K distances. The half course follows the Western States Trail and crosses No Hands Bridge, with start and finish at Overlook Park.

Trail races in Auburn, California in October 2026 run along the American River Canyon with 50K, half marathon, and 5 mile options. Postrace items include a commemorative cider glass, a Ponderosa Cider pour for those 21 plus, and age group a..

Run the 39th Ruth Anderson Memorial Endurance Run on October 10, 2026 in San Francisco. Choose 100 km, 50 miles, or 50 km on a scenic paved loop around Lake Merced with chip timing and certified 50K and 50 mile courses.

Granite Head Trails and Ales offers two scenic fall trail runs at Granite Beach, California. Runners will encounter dirt trails, granite boulders, and a sandy beach along Folsom Lake. All finishers receive a tech shirt, medal, and post-race..

A trail event in Cool, California on October 17, 2026 offering 5k, 10k and a trail half marathon. Proceeds support Black Oak Mines Unified School District youth and a Camp Taylor scholarship, and the event includes family options.

A multi-distance trail running festival in Healdsburg during harvest, combining the Lake Sonoma 50 with a new 100 mile race, a trail marathon, and relay options on nearby trails.

Trail races from a kids run to a half marathon take place inside Marshall Gold Discovery State Historic Park in Coloma, CA. Courses mix singletrack and paved trails with technical climbs, scenic views, aid stations, and finishers' medals.

A remote, self organized foot race near Oxbow Reservoir, CA with unmarked on and off trail routes of roughly 15, 30, and 43 miles and no official aid or medical support.