Trail Running calendar near Outer Richmond 2025-2026

Ring out the year with Almost New Year's Eve at scenic Lake Chabot in Castro Valley on 12/27/25. Trail routes for runners, walkers and hikers include 5K, 10K and half marathon distances with free post race photos.

Celebrate New Year’s Day with scenic loop races at Lake Chabot, from half marathon to 10K, 5K and remote options on rolling trail terrain. Enjoy free race photos and earn a New Year Mega Medal if you also ran Brazen New Year’s Eve.

Run scenic trails through Hacienda Hills at Almaden Quicksilver Park with distances for every level, from kids runs to ultramarathons. Take in Bay Area views, use on course aid and day of race registration, and earn a commemorative finisher..

Run through redwood forests at Huddart Park with distances from a short 8K to a challenging 50K, plus a free kids dash. Expect scenic single track routes, friendly aid stations and a welcoming trail community.

Run through redwood and fern groves at Huddart Park at the Crystal Springs Trail Run on Sunday, January 18, 2026, with distances from a fun 8K and kids dash to challenging marathon and 50K ultras. Aid stations, custom medals and race suppor..

Explore twisty single track and coastal views along Montara Mountain at the Pacifica Foothills Trail Run in San Pedro Valley Park on January 24, 2026. Pick a 10K, half marathon, or rugged 30K and soak up lively aid stations and friendly tra..

Experience iconic San Francisco trails as Spartan Trail takes runners over the Golden Gate Bridge into the Marin Headlands. Distances from 15K to 50M make this coastal challenge a fitting finale for the Spartan Trail World Championship.

Run along the San Francisco Bay at Coyote Hills Regional Park in Fremont with half marathon, 10K and 5K options plus a remote entry. Trails, boardwalks and paved paths make for a scenic, low climb course and walkers are welcome.

Run the 48th Jed Smith Ultra Classic on January 31, 2026 in Sacramento along a scenic mostly flat loop on the American River Parkway. Choose 50 miles, 50K, marathon, 30K or half marathon and enjoy a long sleeve tech shirt and handcrafted fi..

Conquer scenic natural surface trails and the Mt Umunhum ascent at Trail Conquest Winter in Almaden Quicksilver County Park, with distances from a kids run to 50K. Race day registration, aid stations and a commemorative medal for finishers.

Run scenic trails along the Pacific and Marin Headlands with sweeping views of San Francisco and the Golden Gate Bridge. Distances range from 8K to 50K and include a free kids dash, making this a perfect coastal race for every runner.

Join the JW House Hope Run at Vasona Lake Park for a scenic 5K or 10K that welcomes runners, walkers, and teams. Family and stroller friendly, this community event raises funds to support families facing medical crises.

Bay Breeze 2026 on Feb 14 at San Leandro Marina Park offers a scenic, mostly flat bayside course with half, 10K, 5K and a remote runner option. Walkers and hikers welcome, with free volunteer photos and a friendly Brazen Racing vibe.

Chabot Redtail Ridge Trail Run at Lake Chabot Regional Park in Castro Valley on February 21, 2026. Choose distances from 5K to 50K and tackle scenic, moderately technical trails with aid stations and finisher medals for a memorable day on t..

Tackle the scenic trails of Montara Mountain in Pacifica with distance options from a kids dash to a 50K. Expect challenging climbs and coastal views, pre registered runners get shirts and every finisher earns a custom medal.

Run scenic trails around Angel Island from a lively 5 mile loop to a challenging 15 mile climb up Mount Livermore, with custom medals and pre registered shirts. Ferries from Tiburon set the scene for a memorable island race day.

Run or hike scenic Skyline Ridge in La Honda, CA with 50K, 21K and 10K options across rolling ridges and forested trails. All entry fees support the Bay Area Ridge Trail so your miles help protect local open space.

Run scenic trails at China Camp State Park in Santa Venetia with live and virtual 5K, 10K, and half marathon options on March 15, 2026. Expect technical single track, big climbs, and rewarding views for trail runners seeking a challenge.

Run the Marin Ultra Challenge on March 14, 2026 from Rodeo Beach, choosing a rugged 50 Mile or lively 50K through Marin Headlands, Mount Tamalpais and Muir Woods. Expect big climbs, technical single track and sweeping coastal views.

The Big Alta is a three day trail running festival in Marin County offering 28K, 50K and 100K routes that climb scenic ridgelines with sweeping San Francisco Bay views. Expect staffed aid, chip timing and lively post race vibes.