Logo

Tamalpa Headlands 50K

Mill Valley, United States • 16 Aug 2025

The Tamalpa Headlands 50K is a challenging ultramarathon held near Sausalito, California, featuring a single-loop course through Marin County's iconic trails such as Coastal, Miwok, Steep Ravine, Matt Davis, and Dipsea. The race covers 50 kilometers with approximately 6,500 feet of elevation gain, combining fast fire roads, steep climbs, technical singletrack, and stunning views of the Bay Area and Pacific Ocean. The start and finish are at Santos Meadow, near Muir Woods, which also hosts the post-race celebration. The event is the official USATF Trail 50K Championship and offers well-stocked aid stations along the route. It emphasizes environmental care, including a cup-free policy and respectful trail use. 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.
Trail runs nearby

Dirty Dozen Run

Pinole - 15 mi from Mill Valley

The Dirty Dozen Run is an annual trail running event hosted by Brazen Racing at Point Pinole Regional Shoreline in Richmond, California. Scheduled for July 12, 2025, it features 12-hour, 6-hour, and 3-hour endurance races on a scenic 3.37-mile loop composed mostly of dirt fire trails. The course off..

Muir Woods Trail Run

Stinson Beach - 5 mi from Mill Valley

The Muir Woods Mountain Challenge, held in Mt. Tamalpais State Park near Stinson Beach, CA, offers trail runs of 10K, half marathon, and 30K distances. The course features a challenging 2,000-foot climb early on, scenic ridge-line views of Stinson Beach and the Pacific Ocean, and technical single-tr..

Rodeo Valley Trail Run

Sausalito - 4 mi from Mill Valley

The Rodeo Valley Trail Run, held in the scenic Marin Headlands near Sausalito, California, offers trail races of 8K, Half Marathon, 30K, and 50K distances. Starting near historic Fort Cronkhite and Rodeo Beach, the course features challenging steep climbs and descents along coastal trails with stunn..

Skyline 50k Endurance Run

Castro Valley - 30 mi from Mill Valley

The Skyline 50K Endurance Run, held annually in August at Lake Chabot Marina in Castro Valley, California, is the longest-running 50K race in the state and one of the oldest in the U.S. The course features a large loop through the scenic East Bay Regional Parks, reaching Skyline Gate. Known for its..

UTMB Index

Bear Creek Run

Lafayette - 23 mi from Mill Valley

Bear Creek is a trail running event held in Lafayette, California, featuring a half marathon, 10K, and 5K distances. The courses are known for their challenging hills rather than being flat or fast, offering runners and hikers a scenic experience through Briones Regional Park. Participants receive c..

Redwood (Summer) Trail Run

Oakland - 16 mi from Mill Valley

...

The Redwood (Summer) Trail Run, held in Oakland, California, offers a scenic race experience through Redwood Regional Park. Participants can choose from multiple distances including 5 miles, half marathon, 30K, marathon, 50K, and a free kids' 50-yard dash for children six and under. The course featu..