Trail Running calendar near Waterford 2026-2027

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.

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.

Trail running in shaded redwood forest at Sanborn County Park on September 27 2026, with 10K, half marathon and 50K options; steep singletrack, shuttle parking, chip timing and specific mandatory gear for the 50K.

Trailblazer Race in Mountain View features 10K and 5K runs, a 3 mile walk and a kids 1 mile fun run, alongside a festival area. Proceeds support Friends of Stevens Creek Trail.

A trail race at Almaden Quicksilver County Park with distances from 5K to 50K. Courses are out-and-back, marked with colored ribbons, include aid stations and toilets, and the longer races reach Bald Mountain and Mt. Umunhum.

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 in Walnut Creek on October 17, 2026 offer 30K, Half Marathon, 10K and 5K on dirt trails through Castle Rock Park into Mount Diablo State Park. Courses are marked and GPX files plus staffed aid stations are provided.

A 5k cross country race run in two loops around Willow Hill Reservoir next to Folsom High School, part of the Pacific Association USATF Cross Country Grand Prix, with a $75 bonus for breaking an age group record.

A backyard ultra at Beals Point in Granite Bay where runners run a 4.16 mile loop each hour until one remains. A 12 hour Mini format offers the same hourly lap with a fixed limit.

Experience the autumn scenery of Jenkinson Lake at the Trail Run at Sly Park. This event offers distances from a 5K to a 50K ultra on shaded pine forest trails with rolling hills and lakeside views.

Celebrate Halloween with a trail race through San Jose Hellyer County Park. Choose from distances including 5K 10K Half Marathon and Marathon with costume prizes and certified courses.

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.

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.

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.

Experience a flat and fast trail race through the scenic Quarry Lakes Regional Recreation Area in Fremont. Choose from a USATF certified half marathon, 10K, or 5K while enjoying views along the Alameda Creek Trail.

Trail event in El Dorado Hills with distances from 5K to trail marathon on mostly single-track dirt, rolling hills, a creek crossing, marked aid stations, and enforced time limits; finishers receive a medal.

A trail race at Finegold Creek Preserve in Friant, California, featuring a 10k and a 7k on conserved foothill land. Net proceeds support Kids Kasa Foster Care and the Sierra Foothill Conservancy.

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.

Quarry Turkey in Fremont on November 28, 2026 offers a mostly flat half marathon plus 10K, 5K and a short Little Turkeys run for children. The event includes a food drive for Alameda County Food Bank and a virtual entry option.