Womens Headlands Half Marathon

Mill Valley, United States • 4 Oct 2025

The Women's Headlands Half Marathon is a scenic 13.2-mile trail race held annually in the Marin Headlands near Mill Valley, California. Celebrating its third year in 2025, the event features a challenging course with nearly 2,000 feet of elevation gain, showcasing stunning singletrack trails, sweeping views, and exhilarating climbs and descents. The race starts and finishes at the San Francisco Running Company store, fostering a strong trail community atmosphere. New initiatives include group training runs, custom coaching plans, and shuttle services from San Francisco and the East Bay. The event emphasizes both the physical challenge and the rewarding experience of running through iconic Marin terrain. Visit the organization's website for the most recent information.

Race information

21 km
Half Marathon
Visit the organization's website for the most recent information.
Trail runs nearby

Berkeley Trail Adventure is an Inside Trail Racing event set in Berkeley, CA, spanning Tilden Regional Park and Wildcat Canyon. Distances offered are 50K (31 miles), 35K (21.6 miles), half marathon (13 miles), and 10K. The course blends technical dirt trails and non-technical fire roads, with about..

The Dick Collins Firetrails will take place in Castro Valley from Saturday 27 September 2025 to Sunday 28 September 2025. You can run between 42 and 100 kilometers.

UTMB Index

The Pacifica Summit Run is a trail running event held at San Pedro Valley State Park in Pacifica, California. It features two race distances: a 10K and a half marathon. Runners experience scenic views from the tallest mountain on the upper San Francisco Peninsula, including stunning postcard vistas..

Reservoir Dogs Trail Run, held in Orinda, CA on October 4, 2025, features three distances—10K, Half Marathon, and 35K—starting and finishing at the San Pablo Reservoir Recreation Area in EBMUD land. This race was the first to completely circumnavigate Briones Reservoir on permit trails, offering tre..

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..