Saturday - November 29, 2025
7:30 AM @ Old Mill Park
42nd Running of the Quad Dipsea
Course
The Quad Dipsea is two out-and-back trips along the famed Dipsea Trail. The race starts and finishes at Old Mill Park in Mill Valley, California. Unlike the (single) Dipsea and Double Dipsea, short cuts are not permitted! You must run the trail as marked.
Most of the trail is single track. There are LOTS of stairs - 686 in the first three flights alone, some stretches of clean trail, and some stretches with a lot of roots and rocks. There is a total of 9200 feet of climb and an equal amount of descent in the 28 miles.
Aid Stations
All aid stations will be stocked with the normal ultra fare as well as GU Roctane Endurance Drink.
Races that take place within the GGNRA are not allowed to distribute gel packets - please carry your own gels.
Aid Station |
Mile |
Next Aid |
Cutoff |
Start |
0.0 | 4.3 | 7:30 AM |
Cardiac |
4.3 | 2.7 | |
Stinson Beach |
7.0 | 2.7 | |
Cardiac |
9.7 | 4.3 | |
Old Mill Park |
14.0 | 4.3 | 12:00pm |
Cardiac |
18.3 | 2.7 | |
Stinson Beach |
21.0 | 2.7 | 2:15pm |
Cardiac |
23.7 | 4.3 | |
Old Mill Park |
28.0 | 4:30pm |
Drop Bags
You can leave a drop bag at the turn around in Old Mill Park, mile 14. We cannot transport drop bags to the other aid stations.