4MPH Challenge Backyard Ultra


May 07, 2022 at 8:00 AM

4MPH Challenge Backyard Ultra

Volcanic Legacy Scenic Byway

Bartle CA, 96057


Entry Fee $45
(Lowest or Early Registration)

Entry Fee 2 $110
(Highest or Late Registration)

Prize Money: no


  • 100M
  • 12.5M
  • 37.5M

Type: Ultra

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

First Year of the Event: 2013

Men's Record: 2017 Saravanan Mylsamy (41) 126

Masters Men Record: 2017 Saravanan Mylsamy (41) 126

Women's Record: 2017 Marcy Beard (47)96

Masters Women Record: 2017 Marcy Beard (47)96


We have officially partnered with Laz and Bigs Backyard Ultra. HOW FAR WILL YOU GO????

Location: The Great Shasta Rail Trail. It is made for distance!

A secluded and beautiful 4.166667 -mile out and back course along The Great Shasta Rail Trail. Any time under 60 minutes counts as success! When you finish, you can sit down, eat and drink, visit with other runners, whatever.

When the 60 minutes are up, head back the same way

Once again you have exactly 60 minutes to finish. And then…

You Get To Do It Again!

The first time that you fail to finish a 4.166667 mile leg in 60 minutes, game over..

And if you do make it, congratulations, you’re tied for first place!

How many legs can you do? How many miles?

How long can you keep up the pace?

Since everyone starts every lap together and hangs out together between laps, this is a very social event. As for the race yourself, whether your goal is one lap or 20, your main competition is yourself. How far can you go? And will you be able to come back next year and go further? No time limit, I’ll stick around as long as you keep up the 4MPH pace! (I’m not worried, I know that sleep deprivation will catch up with you eventually).

We will have 4 Categories:
1. Up to 12.5 Miles
2. Up to 37.5 Miles
3. Up to 100 Miles
4. Unlimited!


No photos available.


Past Event Dates

Held on May 07, 2022

Held on May 29, 2021

Held on May 30, 2020

Held on May 18, 2019

Event Results