Dipsea Race
Mill Valley to Stinson Beach · Outdoor / Athletic / Historic
The Dipsea Race - America's Oldest Trail Race, Marin County's Most Beloved Athletic Tradition Since 1905
There are races, and then there are pilgrimages. Every year on the second Sunday in June, roughly 1,500 runners line up on Throckmorton Avenue in downtown Mill Valley and launch themselves up the steep, beautiful, merciless trails of Mount Tamalpais toward Stinson Beach in a tradition that is older than most living institutions in American sport. First run in 1905, the Dipsea is the oldest trail race in America - a scenic 7.4-mile course from Mill Valley to Stinson Beach that is widely considered one of the most beautiful race routes in the world.
Born from a Bet Between Two San Francisco Gentlemen
The Dipsea Race grew out of an early 1900s surge in outdoor athletic culture and began as a friendly competition between two San Francisco men, Charles Boas and Alfons Coney, members of the Olympic Club. In 1904, after visiting the newly opened Dipsea Inn near Stinson Beach, someone proposed racing from Mill Valley to the inn. Boas and Coney accepted the challenge with wagers placed by club members, and Boas won.
After that one-time run, participants formed an informal running group called the Dipsea Indians and committed to making the race annual. The first official race took place on November 19, 1905, with 110 runners. More than a century later, demand to enter still far exceeds available spots.
The Course - Dynamite, Cardiac, Steep Ravine, and Insult Hill
If the Dipsea's history is remarkable, the course is legendary. The race starts on Throckmorton Avenue in Mill Valley near the old train depot, cuts through downtown, and quickly turns vertical: runners climb roughly 700 stairs up the mountain, then pass through Muir Woods National Monument, Mount Tamalpais State Park, and the Golden Gate National Recreation Area on the way to Stinson Beach.
The route surges through iconic segments and trail names that generations of runners know by heart: Dynamite, Cardiac, the Swoop, Steep Ravine, and Insult Hill. These names are not decorative; they are earned descriptions. By the time racers crest the final climbs and glimpse the Pacific, nearly everyone has a story they will tell for the rest of their lives.
The Handicap System - Where an 80-Year-Old Can Beat a 28-Year-Old
A defining part of the Dipsea's identity is its historic handicap format, designed to make the race competitive across ages and genders. Runners start in staggered groups, and in the right conditions, a veteran runner can hold off far younger competitors. That structure keeps the race deeply strategic, wildly unpredictable, and uniquely fair in its own tradition-bound way.