Quad Dipsea
- Trail Run
- 46 km
This event offers a scenic coastal ridge trail run on Mt. Tamalpais State Park, with participants enjoying rolling single-track trails and stunning views of the Pacific Ocean, Bolinas Lagoon, and the Marin County watershed. The course utilizes a combination of paved roadways and dirt single-track trails.
Distances: Half Marathon and 10K
Location: Mt Tamalpais State Park, Mill Valley, CA, United States
Date: Saturday, April 25, 2026
Start Time: 8:00 AM PDT
Participant Limit: 300
Course Details:
Cut-off Time: 3 hours
Athlete Check-in: 7:00 - 7:45 AM
Course Markings: Orange ribbon, course monitor for 10K turn, sign for half marathon turnaround.
Aid Stations:
Incentives: T-Shirts for all participants. Personalized award ribbons for top three finishers (male/female) in each age group. Medals for all Half Marathon finishers.
Headphones Policy: Not allowed due to narrow trails and steep drop-offs for safety.
Cancellations: Registrations are non-refundable and non-transferable. Rollover credit available with a $20 fee if cancelled by March 25, 2026, with purchase of refund protection.
Half Marathon - Adult Early Bird Pricing | $87.58 | View |
Half Marathon - Adult | $98.28 | View |
Half Marathon - Adult | $108.98 | View |
10K - Adult Early Bird Pricing | $76.88 | View |
10K - Adult | $87.58 | View |
10K - Adult | $98.28 | View |
Half Marathon - Youth Early Bird Pricing | $34.09 | View |
Half Marathon - Youth | $39.44 | View |
10K - Youth Early Bird Pricing | $28.74 | View |
10K - Youth | $34.09 | View |
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