Trail Running calendar near Riverbank 2026-2027

Trail race at Darrington Trail Head by Folsom Lake offering 5K, 10K, 18M and 36M on rocky single-track with rolling hills, aid stations, drop bags, and a 10-hour overall time limit.

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 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.

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 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.

A point to point half marathon on the Southside Trail at Folsom Lake featuring mostly single track, an overall ascent of 1,683 ft, multiple aid stations and a 4.5 hour time limit, starting at Salmon Falls and finishing at Brown’s Ravine.

Celebrate the final day of the year with a trail run at Lake Chabot in Castro Valley. Choose between half marathon, 10K, and 5K distances with options for runners and hikers alike.

A family-friendly 5K, 10K and half marathon around Lake Chabot in Castro Valley on January 1, 2027. The half marathon is part of the Brazen Ultra Half Series and includes varied trail terrain with notable climbs.

A winter trail event at Almaden Quicksilver County Park offering distances from a kids run to a 50K, marked dirt-road courses, aid stations with toilets, drop-bag service for longer races, and measurable elevation gain.

Join a community run and walk along the scenic trails of the Tuolumne River Regional Parkway in Modesto. Support the Sole Support Sponsorship Program while completing a 5K course alongside friends and family.

Crystal Springs Trail Run on January 17, 2027 in Woodside California offers distances from an 8K to a 50K plus a free kids 50yd dash. Routes run through Huddart Park, King's Mountain and Bear Gulch with marked trails and regular aid station..

Run through the towering redwoods and lush ferns of Huddart Park in Woodside. This trail event offers multiple distances from a five mile race to a 50K ultramarathon plus a free dash for children.

Trail races on single-track trails around Folsom Lake with distances from a kids run to 50K, marked routes and staffed aid stations; parking is paid and dogs are not allowed on course.

Trail runs at Granite Beach along Folsom Lake with 5K and 10K courses, finisher medals, aid stations, and awards. Organized by Total Body Fitness with entry fees, spring package options, and a volunteer voucher program.

Runs along the bay at Coyote Hills Regional Park in Fremont include a half marathon, 10K and 5K on mostly flat courses with mixed surfaces and boardwalks through marsh areas. Walkers are welcome.

Experience a winter run through the technical terrain of the Red Hills Recreation Area in the Sierra Foothills. Choose between six or twelve mile distances featuring water crossings and muddy trails in a scenic natural environment.

Mt. Umunhum Trail Conquest (Winter) is a multi-distance trail event at Almaden Quicksilver County Park offering races from a kids run to a 50K with marked out-and-back courses, multiple aid stations, and summit sections to Bald Mountain or..

Trail races at Granite Beach along Folsom Lake include a 5K and a 10 Miler on February 6 and 7, 2027, with aid stations, finisher medals, race shirts for sale, and both age group and overall awards.

Scenic races along the San Francisco Bay on February 13, 2027 with a half marathon, 10K and 5K starting and finishing at San Leandro Marina Park. Walkers are welcome and volunteer photographers provide free photos.

Trail races at Granite Beach along Folsom Lake featuring a 5K and a half marathon on single track trails with scenic lake views and stocked aid stations. Finisher medals and pre order race shirts are available.