Trail Running calendar near Fairfield 2026-2027

Way Too Cool in Cool, California brings scenic 50K and 10 mile trail runs over rolling hills and creek crossings. Enjoy stocked aid stations, a handcrafted finisher medallion, and post race tacos with a beer garden.

Skyline Ridge Trail Run and Hike in La Honda CA offers 50K, 21K and 10K routes across scenic ridges and forests, with hikers welcome on the shorter courses. This fundraiser sends 100% of entry fees to Bay Area Ridge Trail; register by Mar 6..

Join the Greater Sacramento Area Polar Plunge & Runs for a chilly community plunge and scenic runs. Pick a timed 5K trail or a 1 Mile fun run, fundraise for Special Olympics Northern California and even register as a 'chicken' to stay dry.

Run through iconic Marin Headlands, Mt Tamalpais and Muir Woods in this scenic trail ultramarathon with 50 Mile and 50K options showcasing coastal views and big climbs. Expect technical single track, steep climbs and unforgettable scenery.

Challenge yourself on the scenic, technical trails of China Camp State Park with 5K, 10K and Half Marathon options March 13 to 16, 2026. Live and virtual entries available with registration price rising after Dec 31, 2025.

Big Alta is a three day trail running festival in Marin County with summit routes and stunning San Francisco Bay views. Choose from 28K, 50K or a point to point 100K, all with live timing and stocked aid stations.

Rattlesnake Dick is a scenic, challenging trail race in Cool California on March 21 2026 with 50K 25K and 10K options and significant elevation gain. All entrants get a North Fork Clothing race shirt and finishers earn weighted medallions w..

Run scenic single track trails, hills and streams at Bothe Napa Valley State Park in the intimate 300 runner Napa Valley Trail. Choose marathon, half marathon or 10K and get a race shirt plus finisher medals for full and half.

Run peaceful redwood trails in Oakland with distances from a kids 50 yard dash to 50K ultras, plus family friendly 5K and marathon options. Enjoy scenic singletrack, stocked aid stations and springtime forest views.

Join the 15th Annual Spirit of Benny 10K and 5K in Placerville on March 21, 2026 with a virtual option through March 29. Run or walk to support New Morning Youth & Family Services and local nonprofits helping seriously ill and at risk kids.

Join the Lag Bon 10K trail run in Fairfax on March 22 to celebrate World Water Day and support Evidence Action's Safe Water Now program. Limited to 100 runners, the technical 10K features stairs, roots and muddy singletrack and runs rain or..

Scenic half marathon in La Honda at Skyline Ridge, with runnable single track and fireroad through woods and hills offering ocean and bay views. Proceeds benefit The Hatuey Project and entry fees are matched to double the gift.

Join Western Pacific 2026 at Quarry Lakes in Fremont for scenic half marathon, 10K and 5K routes along the Western Pacific and Alameda Creek trails. Mostly flat trails welcome runners, walkers and remote runners.

Scenic, technical trails in Auburn offer distances from 5K to a rugged 35K with sections of the Western States trail and landmarks like No Hands Bridge. Small field with aid stations but the race is cupless so bring your own bottle.

Run scenic single track trails along Folsom Lake through oak and grass, with technical sections and shaded viewpoints. Choose from half marathon, 8 mile, 10K or 5K, grab same day registration and a commemorative medal at the finish.

Limited to 400 runners, the Golden Gate Headlands Marathon, Half Marathon and 10K invites trail lovers to Mill Valley, CA. Run single track trails and fire roads with sweeping views of the Golden Gate Bridge, San Francisco Bay and Pacific.

Take on Mount Diablo on April 4, 2026 with trail distances from 5K to 50K, including a challenging ultra half that often exceeds 13.1 miles. Organized by Brazen Racing, the event supports Save Mount Diablo and offers remote entries and post..

Run the scenic American River Parkway from Folsom to Auburn with 50, 25 or 10 mile options. Expect aid stations, a tech shirt and finisher medallion, plus a festive post race party with food and a beer garden.

Romancing the Island at Angel Island State Park offers a scenic half marathon or 10K loop with iconic Bay views. Limited to 400 runners, this intimate island race is ferry accessible and unforgettable.

Run scenic Lake Sonoma trails near Healdsburg with a 100K Western States qualifier, a 50K, and a women only Trail Sisters half. Expect rolling singletrack, lake views, on course aid and a memorable finish with a custom bottle of wine.