Trail Running calendar near Fairfield 2025-2026

Run a scenic point to point trail half marathon along Folsom Lake, winding on single track through oak groves, grassy slopes and Sierra views. Expect technical sections, gentle rolling hills and shuttle service back to the start.

Run through towering redwoods at Sanborn Regional Park with half marathon, 10K and 5K options plus a remote runner choice. Expect scenic climbs, narrow single track trails, professional chip timing and custom finisher medals.

Experience a scenic loop around Angel Island with views of the Golden Gate and Alcatraz at the 37th Hark the Herald, offering a half marathon and a hilly 10K. Limited to 400 runners, includes ferry transport and finisher swag.

Doomsday is a trail run in Cool, California on December 13 with 50K and Half Marathon routes across rugged high elevation terrain. Limited to 200 runners, this scenic but demanding race rewards finishers with medals and shirts.

Celebrate the season with Placerville's Holiday Jingle & Mingle Run on the scenic El Dorado Trail, offering distances from a kids run to a half marathon. Enjoy oak lined views, festive fun, aid stations and a commemorative medal at the fini..

Experience scenic single track trails under redwood canopy and along ridgelines at the Woodside Ramble. Distances from 10K to 50K offer a challenging, festive trail day; the event is sold out.

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.

Kick off the new year on the trails at Overlook Park in Auburn, CA with the Auburn Resolution Run. Choose 5K, 10K, 10 mile or virtual and earn a 2026 finisher medal for completing the course.

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 scenic shoreline single track at Granite Beach with 12K and 5K options, then toast your effort with a custom IPA glass and locally brewed beer for participants 21 and over. Enjoy post race food and age group awards in a lively community..

Take on rugged singletrack and big climbs at the No Hands Trail Run in Auburn CA on Jan 10, 2026, with distances from 8K to 50K to suit every trail runner. Enjoy friendly aid stations, cupless racing and a custom pint glass for 50K finisher..

Join Hope in Every Step 5K in Modesto, California on January 10, 2026 for a scenic run and walk along the Tuolumne River Parkway trails. Enjoy community vibes, teal race shirts, and friendly competition with awards for top finishers.

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..

Run the Sweetwater Trail at Folsom Lake on Jan 24 with distances from kids run to 50K on mostly single track through oak woods and rolling hills. All finishers get a commemorative medal and aid stations support longer routes.

Enjoy scenic shoreline trails at Folsom Lake with the Gumby 5K or 10K on January 24, 2026. Expect a fun, challenging course on single track and groomed trails, plus finisher medals and pre order soft cotton shirts.

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..

Run across the Golden Gate Bridge and through the Marin Headlands with sweeping mountain and ocean views. Spartan's Golden Gate Trail Classic offers trail distances from 15K to 50 mile for runners of all levels.

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.