Trail Running calendar near Duncans Mills 2025-2026

Challenge yourself at the 39th Golden Gate Park XC Open on November 1, 2025 in San Francisco, a scenic two loop 5k over grass, dirt and rolling hills. The event hosts the USATF Masters 5k XC National Championship alongside competitive open..

Run through towering redwoods at the Oakland Tech 5 km fundraiser, with a 1 mile fun run or walk for all levels. Enjoy scenic trails while supporting Oakland Tech PTSA and the school cross country team.

Join scenic trails around Lake Chabot on November 8, 2025 with distances from 8K to 50K and a free kids dash. Expect rolling hills, well marked routes, finisher medals and tech shirts for pre registered runners at the Marina.

Run scenic, technical trails on Mt Tam with sweeping coastal views and big climbs, then celebrate with food and drinks on Stinson Beach. Four distances from 10K to 50K welcome every level of trail runner.

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.

Quad Dipsea in Mill Valley is a brutal but beautiful 28.4 mile trail challenge with about 9,000 feet of climbing on the legendary Dipsea Trail. Stairs, steep single track and ocean views make the out and back to Stinson Beach an unforgettab..

Run Krampus Cross Country in San Francisco live on Dec 7 or virtually Dec 5 to 8 with 5K 10K and the Naughty Nine Miler. All entrants get a wooden woodallion a Krampus tee and a beer sampler stein plus a brewfest on Dec 5.

Run scenic Marin trails at China Camp State Park with 30K (19.5 miles), Half Marathon (13.1 miles) or 10K. Expect technical dirt trails, a small field vibe, and a cupless format so bring your own bottle.

Run the iconic Hunter S. Thompson Fear & Loathing in San Francisco on December 7, a free grassroots single loop that winds past city landmarks and finishes at Twin Peaks. Choose 50 mile or 50K distances and help support Shoes For Runners.

Run a scenic, challenging loop around Angel Island with sweeping views of the Golden Gate, Alcatraz and San Francisco. Choose the half marathon or 10K and ride the chartered ferry to this intimate 400 runner event.

Ring out the year with Almost New Year's Eve at scenic Lake Chabot in Castro Valley on 12/27/25. Trail routes for runners, walkers and hikers include 5K, 10K and half marathon distances with free post race photos.

Start the year on scenic Lake Chabot trails with Brazen New Year's Day, offering half marathon, 10K, 5K and virtual options with timed results and free photos. Celebrate challenging trail miles and earn a commemorative medal.

Take on the Pacifica Foothills Trail Run on January 24, 2026 at San Pedro Valley County Park. Choose 30K, half marathon or 10K across Montara Mountain single track for rugged coastal views, chip timed results and well stocked aid stations.

Hit the coastal trails at Rodeo Beach in Sausalito on February 7, 2026 with options from a kids dash to a rugged 50K. Enjoy scenic single track, full aid stations, finisher medals and a welcoming finish line atmosphere.

Bay Breeze invites runners to a scenic, mostly flat bayside course at San Leandro Marina Park on February 14, 2026, with a half marathon, 10K and 5K. Expect chip timing, finisher medals and shirts, stocked aid stations and free race photos.

Tackle scenic single track trails on Montara Mountain with distances from 10K to 50K and a free kids dash. Coastal views, well marked courses, and fully stocked aid stations make this a memorable trail challenge.

On February 21, 2026, take on scenic singletrack and fire road loops at Lake Chabot with distances from 5K to 50K for runners of all abilities. Well stocked aid stations and professional timing make this a welcoming, small field trail chall..

Experience panoramic Bay views on the hilly trails of Angel Island with 5, 10, and 15 mile options and a free kids dash. Finishers earn custom medals and pre registered runners receive shirts; a charter ferry from Tiburon is required.

Tackle scenic trails at China Camp State Park in March 2026 with in person or virtual 5K, 10K, and a challenging half marathon. All entrants receive a beer sampler stein, event shirt, and handcrafted woodallion.

Run the Marin Headlands, Mt Tamalpais and Muir Woods on scenic, challenging trails, starting and finishing at Rodeo Beach. Choose 50 Mile or 50K, soak up coastal views and big climbs, and relish a well supported, limited field ultra.