Trail Running calendar near Duncans Mills 2025-2026

The Berkeley Trail Adventure is a scenic trail running event held in Berkeley, California, within Tilden Regional Park and Wildcat Canyon. It offers four race distances: 10K, half marathon, 35K, and 50K, catering to runners of all levels, including first-time trail runners. The courses feature a mix..

The Rocky Ridge Trail Half Marathon is a challenging trail race held in the scenic Las Trampas Wilderness near San Ramon, California. Scheduled for September 20, 2025, the event features a half marathon, 10K, and 5K distances. Known for its tough terrain and significant elevation changes, the half m..

The Dick Collins Firetrails will take place in Castro Valley from Saturday 27 September 2025 to Sunday 28 September 2025. You can run between 42 and 100 kilometers.

The Pacifica Summit Run is a scenic trail running event held at San Pedro Valley State Park in Pacifica, California. It offers two race distances: a 10K and a half marathon. Runners experience challenging switchbacks and enjoy stunning postcard views of the Pacific Ocean coastline from the tallest m..

The Star City San Bruno Mountain Half Marathon & 5K, held in Brisbane, California, offers a scenic trail running experience with spectacular views of the Pacific Ocean, San Francisco Bay, and the city skyline. The half marathon course is 93% trail, featuring 2,400 feet of elevation gain and a thrill..

The Reservoir Dogs Trail Run in Orinda, CA, offers 10K, Half Marathon, and 35K distances around the scenic Briones Reservoir on East Bay Municipal Utility District (EBMUD) trails. This event features a mix of rolling fire roads, tree-covered single-track, and expansive views of watershed lands, prov..

The SFRC Women's Headlands Half Marathon is a scenic trail running event held in the Marin Headlands, starting and finishing at Rodeo Beach near Sausalito, California. The race features a challenging 12.6-mile half marathon with 2,494 feet of elevation gain, alongside a 6-mile 10K option. Both cours..

The Ruth Anderson Memorial Endurance Run is a prestigious running event held annually in San Francisco, California, since 1986. This endurance race features multiple distances, including 50 miles, 100 kilometers, and 50 kilometers, attracting runners of various skill levels. The course consists of a..

Go Wild Marin 4 Hr is an adventurous trail and wilderness scramble held on the Tiburon Peninsula in Corte Madera, California. Participants compete individually or in teams of up to five, navigating a custom map to locate as many as 24 checkpoints scattered across trails and wild areas within a four-..

The Napa Lapa Trail Adventure, hosted by Inside Trail Racing, is a unique time-based trail running event held at Skyline Wilderness Park in Napa, California. Participants run as far as possible within set time frames of 3, 6, or 12 hours on a 4.16-mile loop featuring approximately 815 feet of elevat..

The Lake Sonoma 100K and 55K, also known as the California Fall Classic, is a challenging ultramarathon held at Lake Sonoma, California, set amidst the scenic wine country during harvest season. The event features two distances—100 kilometers and 55 kilometers—on demanding courses that traverse mile..

The California Fall Classic at Lake Sonoma, held in Healdsburg, CA, offers two challenging ultramarathon distances: 100K and 55K. Set against the stunning backdrop of wine country during harvest season, the courses feature relentless single-track trails with majestic views of Lake Sonoma. The 100K s..

The Diablo Summit Stomp is a trail running event held in Walnut Creek, California, featuring distances of 30K, half marathon, 10K, and 5K. The courses traverse dirt trails starting from Castle Rock Park and extend into Mount Diablo State Park, with the 30K reaching the summit of Mount Diablo. The ev..

The Oakland Hills Trail Run, held at Redwood Regional Park in Oakland, CA, offers challenging trail races in three distances: 10K, half marathon, and 35K ultramarathon. Set in a serene redwood forest with towering 150-foot coast redwoods, the course features technical dirt trails and fire roads with..

The Napa Fall Wine Country Marathon, Half Marathon & 10K is an annual trail running event held at Bothe-Napa Valley State Park in Saint Helena, California. Now in its 33rd year, the race features challenging courses through lush single-track trails with hills, streams, and rocky terrain, offering a..

The Oakland Tech 5km Fundraiser Race and 1 Mile Fun Run/Walk is set to take place at Joaquin Miller Park, supporting the Oakland Tech Cross Country and Track Team. This event features a scenic 5K trail run and a 1-mile fun run/walk, designed to cater to both competitive runners and leisurely partici..

The Lake Chabot Trail Run, held in Castro Valley, California, offers a variety of distances including 8K, Half Marathon, 30K, Marathon, 50K, and a free Kid's Run for children six and under. The course begins at Lake Chabot Regional Park Marina and loops around the scenic Lake Chabot reservoir and su..

The Mt. Tam Trail Run is a scenic trail running event held at Stinson Beach, California, featuring distances of 10K, half marathon, 30K, and 50K. The course begins at Stinson Beach and ascends Mount Tamalpais, offering challenging climbs and stunning views before returning via trails through the Hea..

The Golden Gate Trail Classic will take place in San Francisco from Saturday 22 November 2025 to Sunday 23 November 2025. You can run between 15 and 50 miles.

The Quad Dipsea will take place in Mill Valley on Saturday 29 November 2025.