Trail Running calendar near Santa Cruz 2026-2027

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 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 races in Redwood Regional Park near Oakland offering 10K, half marathon and 35K with significant elevation and technical dirt trails. Aid stations provide food and electrolytes and the event is cupless so runners must carry their own..

A Halloween-themed running event at Hellyer County Park with 5K, 10K, half and full marathon distances, youth divisions, a free kids' dash, a costume contest, certified half and full courses, aid stations every 2-4 miles, and cupless hydrat..

Trail races in Almaden Quicksilver Park from 5K to 50K over hilly dirt roads and single-track, with two staffed aid stations, drop-bag service for longer distances, and a finisher medal for all 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.

A trail event at Huddart Park on November 7, 2026 featuring multiple distances, a 6 Hour Challenge and a youth dash, with aid stations, chip timing and a post race pancake breakfast.

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 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 November trail event at Rancho Cañada del Oro offering distances from 5K to 50K, with steep climbs, single track and two main aid stations. Runners should carry water and be aware of exposed terrain and rattlesnakes.

A flat trail event at Quarry Lakes Regional Recreation Area offering 5K, 10K, half marathon and youth races, cupless aid stations every 2–5 miles, and a USATF-certified half marathon course.

Navigate the redwood forests and meadows of Santa Cruz in this 2 or 4 hour map based adventure scramble. Explore the wilds in teams of up to five while hunting for 20 unique checkpoints.

Celebrate Thanksgiving at Hellyer County Park with a trail race along Coyote Creek. Choose from a USATF certified half marathon, 10K, or 5K while competing for a chance to win a turkey.

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 family friendly Thanksgiving weekend run at Quarry Lakes Regional Park with a half marathon, 10K, 5K and a free short kids race. Costumes and food donations for the Alameda County Community Food Bank are encouraged.

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 running at Calero County Park offers single track, dirt paths and varied climbs across distances from a kids run to a 50K. Courses are marked with colored ribbons and include aid stations, mapped routes and free parking.

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.

Trail races in the redwoods at Sanborn Regional Park offering half marathon, 10K and 5K courses on single-track trails with chip timing and finisher medals. Walkers and hikers are welcome.