Trail Running calendar near Sacramento 2026-2027

Dirt Circus in San Francisco is a free community festival by UltraSignup featuring a social 3.2 mi or 4.5 mi group run, an expo with brand vendors, food, and a raffle, plus local partners and limited on-site parking.

A 10 km trail run on the Olmsted Loop Trail in Cool, California on June 6, 2026. The route follows rolling hills beside the American River Canyon and includes a staffed aid station near mile 3.

The Cool Summer Night Run will take place in Cool on Saturday 6 June 2026. You can run 10 kilometers.

Trail races of 5K and 10K along wetlands, oak bluffs and historic rock-dredge terrain on the north shore of Lake Natoma. Entry fees vary by date and proceeds benefit the Rachel Anne Gray Memorial Scholarship.

Trail run on June 6, 2026 at Lake Natoma in Fair Oaks offering 5K, 10K and a kids run for under 10 years old. Routes pass wetlands, oak woodlands and single track; proceeds support the Rachel Anne Gray Memorial Scholarship.

A monthly community meetup in Richmond offering a conversational group hike or an optional faster trail run, organized by FIERCE Advocates with Moving Forward and Richmond Run Club. Events are family friendly and include free parking.

Experience the 42nd annual Lake Chabot Trail Challenge featuring a scenic half marathon loop and a paved 5K run. Enjoy views of the San Francisco Bay and Mt Diablo while competing for medals on chip timed courses.

A point-to-point 100-mile ultramarathon from UC Berkeley to Skyline High School in Oakland, featuring about 18,000 ft of elevation across ridgelines, redwood forest and lake trails; the 2026 race is sold out with a waitlist.

A multi-distance trail event in Cool, California on June 13 and 14, 2026 featuring 13.5 and 11.5 mile loops, live runner tracking, single track and fire road terrain, and finisher awards for every distance.

A 100-mile trail event on two alternating loops in Cool, California, totaling about 13,600 feet of elevation gain. The race features marked single track and fire roads, aid stations, chip timing with live tracking, and handcrafted finisher..

Experience a fixed-time event at Crissy Field with stunning views of the Golden Gate Bridge. Run or walk as many laps as you choose in three six or twelve hour blocks as an individual or part of a team.

Trail races of 30K, 10K, 5K and a Kids 1K take place at Lagoon Valley Park in Vacaville. Courses are marked and supported with aid stations offering drinks and snacks.

A 5K fun run and walk at Cosumnes River Preserve in Galt, California on June 13, 2026. The in person event follows trails within the preserve, is organized by Cosumnes River Preserve, and has free admission.

Tails & Trails Charitable Walk/Run in Santa Rosa supports Dogwood Animal Rescue with in person and virtual options, flat scenic trails, a community finish area, and a limited edition 2026 dog bandana for participants.

A community 100 mile project in Auburn with two options: a 100 runner relay where each runner covers 1 mile, or a 100 mile in 20 days individual challenge with a finisher buckle.

Live and virtual options at Lake Chabot feature 5K, 10K, and a half marathon with multiple aid stations, on-course nutrition, race apparel and a woodallion, post-race beverages, and a brewfest atmosphere.

A 10-mile trail race in Redwood Regional Park with single-track terrain, a timed 0.8 mile hill climb, age-based handicap starts, limited to 250 runners, and a team competition.

A community Independence Day event at Sycamore Grove Park featuring a flat 5K on mixed paved and dirt trails and a 400 meter kids run for ages 10 and under. T shirts are included with race fees.

A map based urban navigation run in San Francisco with 5K and 10K map courses starting at Ghirardelli Square. Teams of one to five use custom maps to find checkpoints, with refreshments and socializing after the finish.

An unconventional half marathon in Auburn that blends running with extreme ironing, requiring participants to iron a button up shirt at multiple public locations while remaining self supported and documenting each stop on video.