Trail Running calendar near Windsor 2025-2026

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.

Tackle scenic trails at China Camp State Park in San Rafael with 30K, half marathon, or 10K options on December 6, 2025. Technical single track and fire roads, chip timing, and cupless aid stations make this a gritty, well supported winter..

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.

Experience a scenic loop around Angel Island with views of the Golden Gate and Alcatraz at the 37th Hark the Herald, offering a half marathon and a hilly 10K. Limited to 400 runners, includes ferry transport and finisher swag.

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.

Kick off 2026 on the trails around scenic Lake Chabot with a challenging half marathon, 10K, 5K or remote option. Run both Brazen New Year's Eve and New Year's Day to earn the New Year Mega Medal.

Run the scenic, technical trails of Montara Mountain at the Pacifica Foothills Trail Run in San Pedro Valley Park, with 30K, half marathon and 10K options for all abilities. Full aid stations and sweeping coastal views make this a must for..

The Golden Gate Trail Classic will take place in San Francisco from Saturday 24 January 2026 to Sunday 25 January 2026. You can run between 15 and 50 miles.

Jed Smith Ultra Classic in Sacramento on January 31, 2026 offers scenic looped courses along the American River Parkway with distances from 50 miles to the half marathon. Entrants receive a shirt and finishers a handcrafted wooden medal.

Run scenic coastal trails in the Marin Headlands at the Golden Gate Trail Run in Sausalito offering distances from 8K to 50K plus a kids dash. Expect rugged views, stocked aid stations and finisher medals for all.

Soak up San Francisco Bay views at Bay Breeze, a mostly flat road and trail event with half marathon, 10K, 5K and a remote runner option. Walkers and hikers are welcome on the scenic waterside course.

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..

Montara Mountain Trail Run in Pacifica offers distances from 10K to 50K plus a kids dash, with scenic coastal single track and big elevation gains. All finishers earn a custom medal and preregistered runners get shirts.

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.

Challenge yourself on classic Marin trails with towering redwoods, coastal ridges and sweeping bay views starting at Rodeo Beach. Choose a 50 mile or 50K route over technical single track and fire roads for a true Bay Area ultrarunning expe..

Three days of scenic trail running in Marin County with routes summiting Loma Alta and Big Rock Ridge and sweeping Bay Area views. Choose from 28K, 50K or a point to point 100K for a well supported race weekend.

Scenic single track trails, hills and streams in Bothe Napa Valley State Park near Saint Helena host marathon, half and 10K races on March 21, 2026. Limited to 300 runners, the event offers T shirts and medals for the marathon and half.

Run through towering redwoods in Oakland's Redwood Regional Park with distances from a kids 50 yard dash to a challenging 50K. Enjoy ribbon marked singletrack, stocked aid stations, custom finisher medals, and awards for top finishers.

Run the Lag Bon 10K on March 22 in Fairfax on a scenic, technical Lagunitas trail with roots, rocks and muddy sections. This small charity race supports World Water Day with proceeds to safe water programs and runners get a shirt and medal.