San Francisco 50M/50K Endurance Run


May 21, 2022 at 7:00 AM

San Francisco 50M/50K Endurance Run

322 El Paseo Circle

Walnut Creek CA, 94597


Event Facebook page

Entry Fee $85
(Lowest or Early Registration)

Entry Fee 2 $130
(Highest or Late Registration)

Prize Money: yes


  • 50K
  • 50M

Type: Ultra

Starting Elevation: 35

High Point: 1500

Percent of the course on un-paved trails: 95%

First Year of the Event: 2013

Men's Record: 50K - Chris DeNucci, 37, Menlo Park, CA ('17) 4:05:42

Women's Record: 50K - Genevieve Clavier, 53, Sacramento, CA ('17) 5:13:27


Course: Enjoy vistas of the Pacific Coast as you take a scenic tour of the spectacular Marin Headlands with views of Tiburon, Pirates Cove, San Francisco and the Golden Gate Bridge. The 50 miler is an out & back to Stinson Beach with a shortcut to the finish at Rodeo Beach. 50K runners take an easier, shorter route and turns around at infamous Cardiac Hill.
(Distances are accurately measured using a Rolatape® surveyor’s measuring wheel.)

Time Limit & Cut-Off
50 mi – 16 hours
50 KM – 10 hours

50 mi – Pacers are allowed at the Muir Beach aid station (38 mi) or after. Note: the Muir Beach parking lot closes at 8 pm. There is parking available 1/2 mile away along Muir Woods Rd.

Course Surface
(Elevation changes determined using an Avocet altimeter.)

Distance Elevation Gain Single Track Dirt Road Asphalt
50 Km 5,990′ 48% 47% 5%
50 mi 9,890′ 57% 39% 4%


Race event photo
Race event photo


Past Event Dates

Held on May 21, 2022

Held on May 16, 2020

Held on May 18, 2019

Held on Mar 26, 2016