Get ready to experience one of Northern California’s most exhilarating endurance events. On March 14, 2026, the Marin Ultra Challenge returns for its 13th edition—bringing runners face-to-face with the rugged beauty, relentless climbs, and breathtaking descents that define Marin County as a world-class trail destination.
The adventure begins on the dramatic black sands of Rodeo Beach and quickly ascends into the rolling coastal terrain of the Marin Headlands. From there, runners tackle the iconic slopes of Mount Tamalpais, with sweeping views stretching toward the Pacific, before winding through the towering redwoods of Muir Woods National Monument.
This is not your average trail race. Expect a dynamic mix of exposed fire roads with panoramic coastal and inland vistas, tight and technical single-track under redwood canopies, and minimal course overlap that keeps every mile fresh and challenging. Every climb rewards you with a view. Every descent tests your grit.
For seasoned ultrarunners and ambitious first-timers alike, the Marin Ultra Challenge is more than a race—it’s a full immersion into the landscapes that have made Marin County a bucket-list destination for trail athletes worldwide.
Mark your calendar. Lace up. And get ready to see just how far you can go.
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