San Francisco 50M/50K Endurance Run


May 20, 2023 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 20, 2023

Held on May 21, 2022

Held on May 16, 2020

Held on May 18, 2019

Held on Mar 26, 2016