Trail Running calendar near Walnut Creek 2026-2027

A multi-distance trail event around Lake Chabot in Castro Valley on November 7, 2026, offering 8K to 50K options plus a free kids' dash, marked trails, regular aid stations, and a cupless policy.

Trail navigation event in Santa Cruz where solo runners or teams use a custom map to find up to 20 checkpoints in 2 or 4 hour formats; a finish area offers refreshments and social time.

A Thanksgiving morning event in San Jose offering 5K, 10K, a USATF certified half marathon, age-group races and a free kids' 50-yard dash. The course is mostly asphalt, aid stations appear every 2 to 4 miles, and the event is cupless.

A San Francisco trail event offering live and virtual options across three distances. Participants receive a handcrafted woodallion, a Krampus lifestyle tee, and a Krampus beer sampler stein, with pre race pickup and a BREWFEST.

A multi-distance trail event at Quarry Lakes Regional Recreation Area in Fremont featuring 5K, 10K, youth races, and a USATF-certified half marathon along Alameda Creek Trail with crushed-rock surfaces, cupless aid stations, and awards for..

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.