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Pending 2021 Permit:4MPH Challenge Backyard Ultra | Up to 12.5 miles, Up to 37.5 miles, Up to 100 miles, Unlimited

May 29, 2021 @ 8:00 am - June 1, 2022 @ 5:00 pm UTC+0


Up to 12.5 miles | Up to 37.5 miles | Up to 100 miles | Unlimited


Race Information:

Course Map


Start: The Great Shasta Rail Trail-  Bartle


Race Details:


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!

In accordance with Federal law and U.S. Department of Agriculture policy, this institution is prohibited from discriminating on the basis of race, color, national origin,  sex, age or disability. (Not all prohibited bases apply to all programs.)
To file a complaint of discrimination: write USDA, Director, Office of Civil Rights,Room 326-W, Whitten Building, 1400 Independence Avenue, SW, Washington, D.C. 20250-9410 or call (202) 720-5964 (voice and TDD).
USDA is an equal opportunity provider and employer.
Registration Info and Prices:


Four Tiers

Up to 12.5 miles: Group D

  • $45 (until 2/13)
  • $55 (until 4/28)
  • $65

Up to 37.5 miles: Group C

  • $65 (until 2/13)
  • $75(until 4/28)
  • $85 

Up to 100 miles: Group B

  • $90 (until 2/13)
  • $100 (until 4/28)
  • $110

Unlimited: Group A

  • $120 (until 2/13)
  • $130 (until 4/28)
  • $140
Check in & Bib Pickup Details:

Packet Pickup and In Person Registration:

  •  Friday- May 29th 
    • 4pm – 6:30pm: Start/Finish Site


  • Saturday- May 18th (Race Day)
    • 7am – 9:45am: Start/Finish Site (must pick up no later than 15min before start time)
Start Times:

 8am start time:

Group A – Unlimited | Group B-  Up to 100m

10am start time:

Group B & C (up to 36 miles and up to 12 miles )

Time Limit Per Distance

Must finish each 4.166667 mile leg in 60 min

You must also begin each lap ON TIME

Parking Info Directions:

From 5 North:

  • Take exit 736 onto CA 89 toward Mc Cloud
  • Take for 27 miles
  • Turn LEFT onto Harris Springs Rd
  • Start/Finish will be about 900ft on your RIGHT



Post-Race Info:



Excited to be partnering with Elevation Culture!  Every participant will recieve a medal!

*1st Place Male and 1st Place Female of Unlimited will receive Custom Trophy created by Elevation culture

1st Place Male and 1st Place Female will also receive $100 Gift Certificate from Altra Running!

Shirt Info: purchase during registration

Co Branded with Territory Run Co


  • $15 (until May 16)
  • $20 (day before race & race day)
Course Records:
Coming soon!
Course Description:

Nestled in pristine mountains and open forests, near creeks and lakes with majestic views of Mount Shasta is Great Shasta Rail Trail.

Linking the mountain towns of McCloud and Burney in northern California, the red cinder trail carried McCloud Railway lumber trains for over a century.  Established in McCloud in 1896, the railroad expanded with timber harvests; trains arrived in Bartle in 1905 and Burney in 1955. The railroad ceased operations on these sections in 2006, making possible this recreational asset.

The Rail Trail is your advocate in going the distance.  From the Start- you will run out 2 miles before you hit turn around to head back 2 miles.  With amazing views, runable trail and under 200ft of gain you are set up for some distance PR’s!


Elevation Profile:

Elevation Gain: 228ft every 4 miles

Elevation Loss: 228ft every 4 miles



Start and Finish Site:
Aid Station Info:

As the course is 4.166667 miles (out and back) The aid station will be at the Start/Finish site.  You will still want to bring a chair for each end if you are planning to run further than 12 miles.  We will provide aid station fare, you can bring drop bags for your personal dietary preferences.  We can fix something hot and simple for runners who are still competing after the sun goes down (every four miles until the finish).

Sponsors - Partnerships




There is FREE camping available at the Start/Finish Site so come hang out!

Refund Policy
Entry fees to STR runs are non-refundable. With advanced notice, we will transfer 100% of your entry fee if you reach out to us up to TWO WEEKS prior to the event.  You will be able to transfer 50% of your entry fee from TWO WEEKS up to 96hrs of the event.  You must utilize the tranfer fee within 12 months to another STR Event.  Please email shastatrailruns@gmail.com


May 29 @ 8:00 am UTC+0
June 1, 2022 @ 5:00 pm UTC+0
Event Categories:


Bartle- The Great Shasta Rail Trail
Bartle, CA 96057 United States + Google Map

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