Trail Running calendar near Tracy 2025-2026

Event overview The American River Endurance Runs are a set of trail races that finish in Auburn and use the City of Folsom as the start and hospitality host. The event includes a 50-mile ultramarathon that follows the American River Parkway..

Run scenic trails around Mount Diablo with distances from 5K to 50K, including a Brazen Ultra Half Series half marathon. Brazen Racing hosts this April event that benefits Save Mount Diablo and celebrates the region's protected open space.

Event overview The 35th annual Romancing the Island event takes place on April 11, 2026 at Angel Island State Park, Belvedere Tiburon, CA. The race offers two distances: Half Marathon - completes the island loop twice 10K - single loop aro..

Run the scenic Horseshoe Lake Trail Run at Skyline Ridge in La Honda on April 18, 2026, with distances from 5 mile to 50K and a free kids dash. Expect rolling ridge single track, aid stations, and a friendly festival atmosphere.

Event overview Badger Cove Half Marathon/10K/5K 2026 takes place on April 18, 2026, at Del Valle Regional Park in Livermore, California. The event includes on-site race options at Lake Del Valle and a remote runner option. Hikers and walker..

Take on scenic lakeside single track and double wide trails around Folsom Lake with 25K, 50K and 50M options at Outlands Endurance Race. Enjoy stocked aid stations, a post race meal and custom finisher awards.

Event The 2026 Mt. Tam Wild Boar Half Marathon & 10K takes place on April 25, 2026, at Mt. Tamalpais State Park in Mill Valley, California. The event is limited to 300 participants. Distances offered: Half Marathon 10K Course and logi..

Miwok 100K invites trail runners to tackle scenic single track routes with views of the Golden Gate, redwoods and Point Reyes. Choose the solo 100K, a four person relay, or add a paired training plan for a supported, eco minded experience.

2026 Stinson Beach/Muir Woods Marathon, Half Marathon & 7 Mile The event takes place on May 9, 2026, at Stinson Beach Parking Lot in Stinson Beach, California. It is the 36th annual edition and the field is limited to 300 participants...

Run scenic trails around Lake Anza at the Grizzly Peak Trail Run in Tilden Regional Park on May 9, 2026. Distances range from a kids dash to a 50K, with shirts for preregistered runners, custom finisher medals and stocked aid stations.

Trailquake 2026 Trailquake 2026 takes place on May 10, 2026, at 16055 Sanborn Rd, Saratoga, CA. The event offers the following distances: Half marathon 10K 5K The event also includes remote runner and international remote runner options...

Napa Wilderness Trail Runs on May 16, 2026 at Skyline Wilderness Park offers 10K, 21K, 30K and 50K on scenic, rugged trails with steep climbs and sweeping valley views. Bring your own cup for touchless aid stations.

Tackle the Rim Rock 50 Mile Trail Challenge in Napa for a rugged, scenic test across oak forests and exposed ridgelines. Choose solo or two person relay and take on two big loops through Skyline Wilderness Park.

Wildcat 2026 on May 16 in El Sobrante offers scenic 360 degree views of the Bay Area with race choices from 5K to half marathon or a remote option. Join the fun and help support the East Bay Regional Parks Campership Program.

Wild Rose Half Marathon & 5K is a brand-new spring running event in Roseville, California, starting and finishing at Moksa Barrel House. Runners can choose a flat, fast Half Marathon on the Pleasant Grove Bike Path—a forked out-and-back wit..

Run for Amma: May 16, 2026 at Skyline Ridge Open Space Preserve in Los Gatos. Join the 15th anniversary charity trail run where 100% of registration proceeds support UCSF Julia Carnevale Lab cancer research.

Tackle scenic, technical trails in Joaquin Miller and Redwood parks on May 30, 2026, with distances from 8K to 50K plus a free kids dash. Costume contest, stocked aid stations, and big climbs make this a festive, challenging trail day.

Hit the scenic trails of Point Pinole on May 30 for Nitro Trail 2026, with half marathon, 10K and 5K distances plus a remote runner option. Enjoy coastal views and support East Bay Regional Parks with every step.

Run Spartan Trail at Toro Park in Salinas on May 31, where rolling golden hills and smooth trails set the stage for marathon, half and 10K trail races. Enjoy scenic singletrack, a lively community vibe and team and service member discounts.

Bay Area 100 is a scenic yet demanding 100 mile point to point ultramarathon from Berkeley to Oakland across ridgelines, redwood forest and lakes with about 18,000 feet of climbing. Limited to 150 runners for an intimate challenge.