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Tamalpa Headlands 50K

Mill Valley, United States • 16 Aug 2025

The Tamalpa Headlands 50K is a challenging ultramarathon held annually in Marin County, California, starting and finishing at Santos Meadow near Muir Woods. Covering a 50-kilometer single-loop course, it features approximately 6,500 feet of elevation gain across iconic trails such as Coastal, Miwok, Steep Ravine, Matt Davis, and Dipsea. Runners experience a mix of fast fire roads, steep climbs, technical singletrack, and stunning views of the Bay Area and Pacific Ocean. The race, founded in 1998 and supported by the Tamalpa Runners and Arc'teryx, offers a vibrant atmosphere with aid stations, a post-race party, and serves as a USATF Trail 50K Championship event. Visit the organization's website for the most recent information.

United States California Mill Valley

Race information

Website
50 km
6500 m+
50k
Visit the organization's website for the most recent information.
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