Walt Stack DSE Double Dipsea 2026

The Walt Stack DSE Double Dipsea, first run in 1970, is an intense trail running experience that pushes competitors to their limits. This race isn't for the faint-hearted; it's designed with a unique handicapped start format where runners are grouped based on speed, ensuring a constant stream of passing and being passed throughout the course.
Starting at Stinson Beach, racers will navigate through rugged terrain along the Dipsea Trail before reaching Mill Valley and then retracing their steps back to the starting point. The route is steeped in history and natural beauty, offering breathtaking views that make each step worthwhile despite the challenging conditions.
What sets this race apart is its relentless nature—mostly single-track with numerous stairs and hills. Runners must not only conquer physical obstacles but also navigate a complex social landscape as they constantly pass other competitors or find themselves being passed by faster runners. Course record holder Alex Varner, who won in 2012, 2013, and 2014, highlights the strategic aspect of finding safe ways to maneuver around others on such an unforgiving course.
While the race is demanding, it remains accessible for all levels of runners, welcoming those ready to face the challenge. Walt Stack, founder of Dolphin South End Runners Club (DSE), cherished this event and its legacy continues through his namesake.
Prepare yourself for epic views, thrilling adventures, and an unforgettable experience that will test your perseverance on one of California's most iconic trails.