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Marin Ultra Challenge

Sausalito, United States • 14 Mar 2026

The Marin Ultra Challenge is a premier long-distance trail race held in Marin County, California, featuring 50K and 50 Mile distances. The course offers about 11,000 feet of elevation gain for the 50 Mile race, traversing scenic and challenging terrain including Rodeo Beach, Marin Headlands, Mt. Tamalpais, and Muir Woods.

Runners experience a mix of exposed fire roads with coastal views and technical single-track trails under redwood canopies. The event emphasizes a demanding yet beautiful route with minimal trail overlap. Aid stations provide a variety of nutrition and hydration options.

The race is limited to 500 participants and is known for its supportive volunteer community and well-organized logistics. Visit the organization's website for the most recent information.

United States California Sausalito

Race information

Website Registration
50 mi
11000 m+
50 Miler
50 km
50k
Visit the organization's website for the most recent information.
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