Trail Running calendar near Duncans Mills 2026-2027

Navigate through historic San Francisco neighborhoods and parks in this unique 5K or 10K challenge. Use a custom map to find checkpoints and solve riddles individually or in teams of up to five people.

Tackle the legendary Double Dipsea, a 13.7-mile out-and-back on the historic Dipsea Trail from Stinson Beach. This unique race features a handicapped start, putting all runners on a single-track course of constant passing. Experience the hi..

A scenic loop trail race around Angel Island with a single-loop 10K and a half marathon that runs the loop twice; ferry transport is required and included in race pricing, and the field is limited to 400 participants.

Experience the natural scenery of Mount Diablo State Park through a variety of trail races. Runners can select distances ranging from 4 miles to a 50K with spectacular views of the San Francisco Bay Area.

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 running festival at Mendocino Woodlands Park with a looped single-track course through ancient redwoods, offering a half marathon, 10K and timed 6 hour and 12 hour formats, plus on-site camping and weekend food options.

Trail races in Tilden Regional Park offering 50K, 35K, half marathon and 10K distances with aid stations every 5 to 7 miles, a cupless format, limited field of 350, technical shirts, and finish awards across multiple categories.

Experience the rugged beauty of Las Trampas Wilderness at Rocky Ridge 2026. Choose from 5K, 10K, or Half Marathon distances featuring significant hills and expansive vistas in San Ramon.

Dick Collins Firetrails in Castro Valley features a 100k, a 50-mile race, and a marathon on Lake Chabot park trails. The event is UTMB Index and the 50-mile race counts toward the Pacific USATF Grand Prix.

JP's Backyard Ultra/Hike is a final edition event in Napa's Skyline Wilderness Park. Participants run or hike a 3.3-mile loop, choosing their own distance up to 33 miles. This free event is a fundraiser, with a suggested donation supporting..

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.

Experience the beauty of California wine country at the Sonoma Fall Classic. This event offers challenging singletrack trails and majestic lake views across distances ranging from a marathon to a 100 mile ultramarathon.

Experience the trails of Walnut Creek at the Diablo Summit Stomp 2026 featuring 30K, Half Marathon, 10K, and 5K courses. Walkers and hikers are welcome to join this trail event at Castle Rock Road.

Run through the lush single track trails and babbling streams of Bothe Napa Valley State Park. This exclusive event offers marathon, half marathon, and 10K distances for a maximum of 300 participants.

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.

Lake Chabot Trail Run in Castro Valley on November 7, 2026 offers distances from an 8K to a 50K plus a free kids 50 yd dash. The marked trail circles the reservoir with aid stations every 4 to 5 miles and a cupless policy.

Mt. Tam Trail Run offers 10K, half, 30K and 50K trail races at Mt. Tamalpais State Park with technical singletrack, chip timing, cupless aid stations, and a 500 runner capacity.

Escape the wrath of Krampus with this themed cross-country run in San Francisco or from anywhere. Choose from 5K, 10K, or a nine-mile course. All finishers get unique Krampus themed swag, including a woodallion and beer stein.

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.