Trail Running calendar near Duncans Mills 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 weekend running festival in Mendocino Woodlands Park with trail races including a half marathon, 10K and timed 6 and 12 hour events. The event combines looped single track trails, camping, meals and live music.

Trail races at Tilden Regional Park in Berkeley offering 50K, 35K, half marathon and 10K with scenic bay views, aid stations every 5–7 miles, cupless stations, and awards for finishers and age groups.

Rocky Ridge is a trail running event at Las Trampas Wilderness in San Ramon, California on September 19, 2026. It features a half marathon plus 10K and 5K courses with uphill trail sections and scenic vistas.

The 51st Fitch Mountain Footrace in Healdsburg features 10K and 3K courses through downtown, neighborhoods and along the Russian River. The event raises funds for Corazón Healdsburg and a kids running team.

An annual September trail running event at Lake Chabot Marina offering 100k, 50 mile and marathon races with UTMB Index status and Pacific USATF Grand Prix inclusion for the 50 mile race.

A community ultramarathon and hike at Skyline Wilderness Park in Napa, CA, featuring a 3.3-mile loop repeated up to ten times in an hourly format to raise funds for the Pheo Para Alliance.

Experience a trail half marathon on San Bruno Mountain featuring 2,400 feet of elevation gain and stunning views. Enjoy a scenic route with 93 percent trail coverage followed by a post race meal and finishers medal.

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 12.4 mile loop from Mitchell Canyon to Mount Diablo summit with about 4,000 feet of ascent and descent. Entry includes shuttle service, a post race raffle entry, a finisher item, and a five hour cutoff.

Trail races around San Pablo and Briones Reservoirs on October 10, 2026, with 5K, 10K, half marathon and 35K options. The course features single-track and fire roads, aid stations with varied supplies, and awards for finishers.

Trail races at Lake Sonoma in October offering 100 mile, 50 mile, marathon and four person relays. Courses feature extensive singletrack, multiple aid stations, on-site camping and significant elevation gain.

A trail running event at Mount Diablo in Walnut Creek on October 17, 2026 offering 30K, Half Marathon, 10K and 5K courses on hilly trails where mud and creek crossings are possible.

Trail marathon, half marathon, 10K and 5K at Bothe-Napa Valley State Park on October 24, 2026. The single track course features hills, streams and rocks, is marked with orange ribbon, has limited entry and specific cutoff times.

Oakland Hills Trail Run features 10K, half marathon and 35K courses through Redwood Regional Park with technical trails, marked routes, aid stations and chip timing. The event is cupless and limited to 330 runners.

Support student programs and the Oakland Tech Cross Country team at Joaquin Miller Park. Choose between a five kilometer trail race or a one mile fun run through the redwood trees.

Experience a scenic trail run around the Lake Chabot reservoir and hills. With distances from a 50 yard kids dash to a 50K ultramarathon there is an option for everyone at this Castro Valley event.

Trail races run from Stinson Beach to Mt. Tam on November 7, 2026, with distances from 10K to a 50K that has an 8.5 hour time limit. Awards, finisher medals, aid stations, and post-race food are provided.

A 28.4 mile trail race in Mill Valley with about 9,000 feet of climbing on the Dipsea Trail. The course is an out and back to Stinson Beach that is then repeated to complete the Quad.