Trail Running calendar near Lake Sonoma 2026-2027

A 6.45 miles trail race in Annadel State Park organized by the Empire Runners Club, held in early September with staggered age and gender starts, limited to 100 runners and awards for the top 13 finishers.

Experience the trails of China Camp State Park with a selection of distances including a 5K 10K and Half Marathon. Participants enjoy a post race festival with beer steins custom medals and local snacks.

A trail race weekend at Mendocino Woodlands Park featuring a half marathon, 10K and 6 and 12 hour timed events, combined with camping options, weekend food passes and evening live music.

Trail races in Tilden and Wildcat Canyon near Berkeley with 10K, half marathon, 35K and 50K options, aid stations every 5 to 7 miles, a cupless format, and a 350 runner capacity.

A community fundraising run in Healdsburg offering 10K and 3K courses that begin and end near the Historic Downtown Plaza. The 10K loops around Fitch Mountain and the Russian River while the 3K is a flat in-town loop for families and walker..

A community ultramarathon and hike on a 3.3 mile loop at Skyline Wilderness Park in Napa supporting the Pheo Para Alliance. Participants can do one to ten loops with alternating loop directions each hour and on site aid and awards.

Test your endurance at Lake Merced in San Francisco with a scenic 4.5 mile loop course. Choose between a standard run or tackle ultra marathon distances including the 50K and 50 mile events.

A trail event around San Pablo and Briones Reservoirs offering 5K, 10K, half marathon and 35K on single track and fire roads. Aid stations, race shirts, and a 300 runner capacity are part of the event.

A multi-distance trail event at Lake Sonoma on October 17-18, 2026, offering 100 mile, 50 mile, marathon and relay options. Courses use extensive singletrack with lake views, aid stations, crew access, and free on-site camping for participa..

Trail races of several distances take place October 24, 2026 at Bothe-Napa Valley State Park near Saint Helena. The single track courses feature hills, streams, orange ribbon markings, aid stations, and a 300 participant limit.

Trail races from 10K to 50K based at Stinson Beach with steep climbs to Mt. Tam, technical trails, chip timing, cupless aid stations, and age-group and overall awards.

A 28.4 mile out and back trail event from Old Mill Park to Stinson Beach with about 9,000 feet of vertical gain. The route follows the Dipsea Trail, includes multiple named trail sections and aid stations, and is repeated for the Quad.

A seasonal cross country event in San Francisco on 12/6/2026 with live and virtual options. Distances include a 5K, 10K, and a nine mile course; all entrants receive race swag and there is a pre race bib and shirt pickup with Brewfest.

Trail distances at China Camp State Park with coastal views, marked single-track and fire road routes, chip timing, cupless aid stations, and a 275-runner capacity.

The Hunter S. Thompson Fear & Loathing will take place in San Francisco on Sunday 6 December 2026. You can run between 50 and 50 miles.

A trail running event that crosses the Golden Gate Bridge into the Marin Headlands. Races include 15K, 25K, 50K and 50 mile options on January 23 to 24, 2027, organized by Spartan Trail.

Experience the coastal beauty of the Marin Headlands at the Golden Gate Trail Run. Choose from distances ranging from a 50K trail race to a fun kids dash with views of the Golden Gate Bridge and San Francisco.

Experience a trail run across the forest and hills of Angel Island with views of San Francisco and the Golden Gate. Choose from multiple race distances including a youth dash and enjoy a picnic at Ayala Cove.

A three-day trail running event in Marinwood, California on March 19 to 21, 2027 offering 100K point to point and 50K and 28K single-loop courses that summit many of Marin County’s high points with broad bay area views.

A 50K trail race on Northern California’s Mendocino Coast, starting at Big River State Beach and passing river, ocean, redwood and waterfall scenery. Races are listed in April with recent dates including 2025 and 2027.