Featuring many of Marin County’s most famous trails — Coastal, Miwok, Steep Ravine, Matt Davis and Dipsea — the Tamalpa Headlands 50k presented by the Tamalpa Runners provides a spectacular setting for this classic, single-loop ultramarathon that was founded in 1995. Hosted by Tamlpa Runners, Marin’s largest running club, as well as support from UltraRunning Magazine. A hop and a skip from downtown San Francisco, this iconic Ultra Classic is a demanding ultramarathon with approximately 6,500-feet of elevation gain featuring fast fire road running, steep climbs, flowy singletrack, technical sections and stunning views of the Bay Area, Pacific Ocean and beyond. For the 21st edition, the race returns to idyllic and the beloved Santos Meadow in Muir Woods as the staging area for the start and finish line after-party. Please join us on Saturday, August 16th, 2025 to enjoy all the splendor that the Marin Headlands and Mount Tamalpais has to offer in one of the country’s most stunning places to celebrate the sport of ultrarunning.
For questions, please email contact the race director: rd@headlands50k.com
High Point: 1593 Percent of the course on un-paved trails: 95% First Year of the Event: 1995 Men's Record: Andy Wacker 3:37:20 - 2015 Masters Men Record: Scott Creel 3:49:54 - 2003 Women's Record: Megan Roche 4:20:51 - 2016 Masters Women Record: Kami Semick 4:25:15 - 2006