Muir Woods Marathon

Pacifica Summit Run, staged at San Pedro Valley State Park in Pacifica, California, features 10K and half-marathon trail races hosted by Urban Coyote Racing. Runners enjoy postcard views of the Pacific Ocean coastline and plenty of switchbacks as they ascend the summit on the upper San Francisco Pen..

Star City San Bruno Mountain Half Marathon & 5K, organized by the Excelsior Running Club, takes place in Brisbane, CA, on the San Bruno Mountain trails. The course is 93% on trail with about 2,400 feet of elevation gain, including a single-track downhill and sweeping views of the Pacific, Bay, and S..

The Women's Headlands Half Marathon is a trail running event held in the scenic Marin Headlands near Mill Valley, California. This race features a brand-new half marathon course that highlights the area's stunning singletrack trails, challenging climbs, and exhilarating descents, offering runners a..

The Reservoir Dogs Trail Run takes place on Saturday, October 4, 2025, at San Pablo and Briones Reservoirs (EBMUD) in Orinda, CA. The event has a capacity of 300 runners across all distances. Parking is available at the San Pablo Reservoir Boat Launch with a $7 fee; carpooling is encouraged. Dogs a..

The Women’s Headlands Half Marathon is a women’s trail half marathon held on October 4, 2025, in the Marin Headlands region near Mill Valley, California. The course covers 13.2 miles with approximately 1,959 ft of elevation gain, using singletrack with climbs and descents and views of the Headlands..

Go Wild Marin offers a trail and wilderness navigation challenge in Corte Madera, California, with 2-hour and 4-hour options. Teams of 1 to 5 use a custom map to locate up to 24 checkpoints scattered along trails and wild areas of the Tiburon Peninsula. The event emphasizes exploration and navigatio..