Quad Dipsea

Mill Valley, United States • 29 Nov 2025

Event overview

The Quad Dipsea is a trail running event in Mill Valley, California, scheduled for Saturday, November 29, 2025. The race distance is 28.4 miles with about 9,000 feet of total vertical. The course is an out-and-back to Stinson Beach and back to Old Mill Park, and that round trip is then repeated to complete the full event. Registration opens August 1, 2025 and closes November 28, 2025. A wait list is used; invitations to register are sent as spots open and the entrant list is finalized by November 20.

Course, aid, and rules

The course follows the Dipsea Trail for the entire route; shortcuts are not allowed. Terrain includes many stairs, steep climbs and descents, single-track trails, creek crossings, and named trail sections such as Windy Gap, Muir Woods, Dynamite, The Hogsback, The Rainforest, Cardiac, Steep Ravine, Insult Hill, and The Moors. Aid stations are located at Cardiac Hill, Stinson Beach, and Old Mill Park (start/finish and the halfway point). Due to single-track sections, pacers are not permitted and hiking or trekking poles are not allowed. There are time limits and cutoffs at the halfway turnaround, at the Stinson Beach turnaround, and at the finish. Refunds, rollovers, and exchanges are not permitted. Visit the organization's website for the most recent information.

Race information

UTMB 50K
Quad Dipsea
Visit the organization's website for the most recent information.
Trail runs nearby

Challenge yourself at the 39th Golden Gate Park XC Open on November 1, 2025 in San Francisco, a scenic two loop 5k over grass, dirt and rolling hills. The event hosts the USATF Masters 5k XC National Championship alongside competitive open..

Run through towering redwoods at the Oakland Tech 5 km fundraiser, with a 1 mile fun run or walk for all levels. Enjoy scenic trails while supporting Oakland Tech PTSA and the school cross country team.

Join scenic trails around Lake Chabot on November 8, 2025 with distances from 8K to 50K and a free kids dash. Expect rolling hills, well marked routes, finisher medals and tech shirts for pre registered runners at the Marina.

Run scenic, technical trails on Mt Tam with sweeping coastal views and big climbs, then celebrate with food and drinks on Stinson Beach. Four distances from 10K to 50K welcome every level of trail runner.

The Golden Gate Trail Classic will take place in San Francisco from Saturday 22 November 2025 to Sunday 23 November 2025. You can run between 15 and 50 miles.

Celebrate Thanksgiving at the Moraga Turkey Trot, a friendly 5K or 1.5 mile run or walk on the Moraga Country Club cart path. Advance registration is required, proceeds benefit the food bank and participants get a tee, bib and prize chances..