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San Francisco 50mi/50km Endurance Run

  • (This event has been postponed until undefined)

This event has been postponed

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Take on the ultimate challenge and complete your first ultramarathon in the Golden Gate National Recreation Area. Great for those seeking to push their limit, the 50km and 50 mile courses behold stunning views of the Marin Headlands. Come along for a backdrop like no other.

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San Francisco 50mi/50km Endurance Run routes

Both courses will enjoy a striking trail running tour of the Marin Headlands which will offer views of Tiburon, Pirates Cove, San Francisco and the iconic Golden Gate Bridge.

Kicking off from Rodeo Beach, the 50 mile route is an out and back to Stinson Beach before taking a shortcut to finish back at Rodeo Beach. The 50km route offers a slightly easier route that turns back at the notorious Cardiac Hill.

Course Surfaces:

50km - (Elevation 5,990, 48% Single Track, 47% Dirt Road, 5% Asphalt)
50 mi - (Elevation 9,890', 57% Single Track, 39% Dirt Road, 4% Asphalt)

Event Details

What’s Included
  • Fully stocked aid stations
  • T-shirt for pre-registered runners
  • Bespoke finisher's medal
  • Custom coaster (50km finisher's only)
  • Cash prize for the Top 3 (M & F) in all distances: 1st - $50, 2nd - $35, 3rd - $20
Raceday Logistics


6:00am - 6:45am: Bib number & Shirt Pick-Up

7:00am: 50km/50 mile race start

Please arrive at least 45 minutes before the race start to ensure there is ample time to collect your number and shirt.


Volunteers are a huge part of bringing Coastal Trail Runs epic races to life. Roles vary from race-to-race but often include manning aid stations, helping at registration, or distributing those cherished finisher's medals.

In return, you will receive a 'standard' entry into a race if you help for 5 hours, $25 discount (2 hours), or $15 (1 hour).

If you would like to find out more then simple fill out the form here:

Frequently Asked Questions

Is there a cut-off time for the San Francisco 50mi/50km Endurance Run races?
Yes, there will be a cut-off time of 16 hours for the 50 mile event and 10 hours for 50km event.
What are the aid stations at the San Francisco 50mi/50km Endurance Run races stocked with?
Stations will have an abundance of fresh fruit, salty snacks, assorted candy, boiled potatoes & salt, water and Clif Shot Electrolyte sports drinks. The start and finish and Tennessee Valley stations will also have soup and other substantial food.
Should I still bring my own water?
Absolutely, runners are advised to bring at least 20 oz. water between aid stations. Additionally, in an effort to help the environment Coastal Trail Runs are going cupless and ask that runners bring their own water containers. There will be Hydrapak SpeedCup's on sale for $5 at check-in.
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San Francisco 50mi/50km Endurance Run weather forecast

Partly cloudy throughout the day.

Predicted highs
Predicted lows
IconLight breeze possible, up to 9mph

Meet the organizer

Our events are located in amazingly beautiful parks and recreation areas in California. We are known for our well-marked courses, accurately measured distances, immediate race results, quality shirt designs, and low-key, friendly atmosphere. For courses that are designed to be easier, flatter, and faster, check out one of our Zoom or ZombieRunner events. We have organized over 400 events during the past 16 years. We love trail running and we promise you a rewarding experience.

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