Trail Running calendar near Redwood City 2025-2026

Explore Napa's wild side on scenic single track and fire roads around Mount St Helena, starting and finishing at the Calistoga Fairgrounds Great Lawn. Choose from 10K to 50K distances, with UTMB Index status for select races.

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..

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..

Run the Miwok 100K from Stinson Beach through scenic Marin single track trails and big climbs. Run solo or as a four person relay; this UTMB index race and Western States qualifier champions sustainability.

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...

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, held at 3800 Clark Road in El Sobrante, California, offers a Half Marathon, 10K, and 5K. The page highlights spectacular 360-degree views of the Bay Area from the course. Specific route details aren’t described, but the event..

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.

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.

Toro Park Trail Run, part of the Monterey Spartan Trail weekend, takes place in Salinas, California. Runners explore Toro Park’s scenic Bay Area terrain, featuring rolling golden hills, sparse coast live oaks for brief shade, and smooth tra..

Bay Area 100 is a 100-mile ultramarathon held in Oakland, California. The race is associated with a location at 12500 Campus Drive in the Bay Area, indicating the event’s hub in Oakland. The official site bayarea100.com provides registratio..

Skyline 50K Endurance Run is one of the oldest continuously running 50k races in the United States. The course starts and finishes at Lake Chabot Marina in Castro Valley, California, and follows a large loop through East Bay Regional Parks..