Trail Running calendar near Healdsburg 2026-2027

Redtail Ridge at Lake Chabot on February 21, 2026 features 5K to 50K trail races on mixed dirt trails, fire roads and some paved sections. The event is chip timed, cupless, and limited to 500 runners.

Montara Mountain Trail Run in Pacifica on Feb 21, 2026 offers distances from a 10K to a 50K plus a free kids 50 yd dash, marked courses, aid stations every 6 to 7 miles, and a cupless hydration policy.

This trail run in Walnut Creek's Lime Ridge area features unmapped courses. Runners follow a map to find checkpoints, choosing their own path through oak trees and quarries. Snacks await at the finish.

The Zoom Angel Island will take place in Tiburon on Sunday 1 March 2026. You can run between 5 and 15 miles.

A spring trail event at China Camp State Park offering live and virtual 5K, 10K and half marathon options. Courses include technical single track and substantial elevation and organizers do not offer refunds.

A long-distance trail event in Sausalito featuring a 50K and 50 Mile through Marin Headlands, Muir Woods, and Mt. Tamalpais, with live timing, aid stations, cupless provisions, and cash prizes for top 50 Mile finishers.

A trail running weekend in Marinwood, California, with 28K and 50K single loops plus a point-to-point 100K, featuring routes that summit several high points and offer wide views across the San Francisco Bay Area.

A trail race at Bothe Napa Valley State Park on March 21, 2026 offering marathon, half marathon and 10K with a 300 runner limit. Courses use single track loops with one aid station and a six hour marathon cutoff.

A trail event in Oakland through Redwood Regional Park offering distances from a kids 50 yd dash to a 50K. Marked loops, aid stations every 5 to 6 miles, cupless event.

A 22.5K event in Clayton, California on March 21, 2026, organized by Nomadic Adventure Club; registration closes March 20 and donations support the club’s free community initiatives.

A charity trail run on March 22, 2026, at Lake Lagunitas near Fairfax, CA. The 10 km course includes technical terrain and ~400 feet of elevation change, with proceeds beyond event costs donated to Evidence Action's Safe Water Now program.

Trail races in the Marin Headlands near Mill Valley offering marathon, half marathon and 10K routes on single track and fire roads with views of the Golden Gate Bridge, San Francisco Bay and the Pacific Ocean. The field is limited to 400 pa..

Trail runs on Mount Diablo on April 4, 2026 offering 50K, half marathon, 10K and 5K distances with a portion of fees supporting Save Mount Diablo. The half marathon is included in the Brazen Ultra Half Series.

Run the scenic, hilly trails encircling Angel Island with views of the Golden Gate Bridge and San Francisco Bay. Choose between a 10K loop or a half marathon that does the loop twice. The event includes ferry transport and is limited to 400..

Springtime trail races at Lake Sonoma on April 11, 2026 feature a Western States qualifying 100K, a 50K that crosses the Lake Sonoma bridge, and a women-only Trail Sisters half marathon with shuttle service.

Multiple marked trail distances circle Lake Chabot reservoir in Castro Valley, from a free 50 yard kids dash to a 50K. Aid stations occur every 4 to 5 miles and the event operates cupless, so bring a personal cup or soft flask.

Event Overview The Calistoga Mountain Run is a trail running event with distances of 50k, 35k, a half marathon, and a 10k. It starts in downtown Calistoga, California. The routes take runners onto trails and into Robert Louis Stevenson Stat..

A 50K trail run along Northern California's Mendocino Coast, featuring river crossings, redwood forest sections and waterfalls. The course finishes on the Mendocino Village bluffs with views over the Pacific Ocean.

A community fundraiser at Spring Lake Regional Park on April 18, 2026 featuring a half marathon, 10K and 5K. The low-waste event donates a portion of proceeds to Trione-Annadel State Park and includes a medal, shirt and post-race snacks.

Trail race on Mt Tamalpais with a Half Marathon and 10K on coastal ridge single-track and road, limited to 300 participants, with aid stations, course markings, and participant t-shirts.