Trail Running calendar near Fairfield 2026-2027

A trail running event at Point Pinole on May 30, 2026, offering a half marathon, 10K and 5K. The original Brazen Racing event welcomes runners and walkers and includes bib pickup, posted results, free photos and volunteer roles.

Experience a technical trail race through the redwood groves of Joaquin Miller and Redwood Regional parks. Choose from multiple distances ranging from an 8K to a 50K ultra marathon on accurately measured courses.

San Mateo PAL's May 30, 2026 community event at Seal Point Park features a 5K run/walk, a 10K run, a free Wellness Fair, and a yoga option. Race entries include a t-shirt and finisher medal, and vendor booths are available.

These trail runs explore the beautiful Sonoma Coast State Park. The courses traverse a scenic ridgeline with ocean views and summit Red Hill. The event will return in 2027 with a planned new location in Monte Rio.

An evening trail event at Dos Rios State Park near Modesto offering 3 mile and 5 mile runs on fire roads along the Tuolumne River. Free registration and an informal post run gathering with donations supporting park rangers.

A one-day festival in Berkeley on May 31 featuring free road and trail runs, demo shoes from major brands, a $10,000-plus raffle, food and beer, and fundraising for youth running in Oakland.

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.

A trail event at Almaden-Quicksilver County Park on June 7, 2025 offering distances from 5K to 50K, steep climbs, marked courses, aid stations, and toilet facilities. The 52 mile race is not held in 2025 and is planned to return in 2026.

Scenic trail runs on the north shore of Lake Natoma in Fair Oaks with 5K, 10K and a kids run under 10. Hosted by the Fair Oaks Recreation & Park District, proceeds benefit the Rachel Anne Gray Memorial Scholarship.

A monthly community hike with an optional trail run pace at 5551 Giant Highway in Richmond, CA. Organized by FIERCE Advocates with Moving Forward and Richmond Run Club, the series runs on first Saturdays in 2026 and shares route details bef..

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 run and walk on the trails of the Cosumnes River Preserve in Galt, CA, offered as an in-person outdoor event on June 13, 2026. The listing notes an overall duration of about three hours and free online ticket availability.