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To Bone and Back Relay

Sat June 27 2026
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To Bone and Back Relay

Sat June 27, 2026
Idaho Falls, ID 83401 US Directions

40-Mile Solo

We'll be honest, this is a TOUGH Ultra-Marathon. Our course is 100% on asphalt road and is very hilly!
Start Time:
5:30am MDT
End Time:
4:00pm MDT
Price:
$45.00 Race Fee + $4.86 SignUp Fee
Registration:
Price increases to $65.00 after April 1, 2026 at 11:59pm MDT
Sign Up

2-Person Relay

This is a two-person relay! You can divide up the mileage in any way you would like. However, you can only exchange runners at our 5-mile aid stations. We have seen teams switch every five miles, every 10 miles, at halfway, or we've had some do 5,10,10,10,5. It is ultimately up to you and your teammate on how you'd like to divide this up.
Start Time:
5:30am MDT
End Time:
4:00pm MDT
Price:
$25.00 Race Fee + $3.50 SignUp Fee
Registration:
Price increases to $35.00 after April 1, 2026 at 11:59pm MDT
Sign Up

4-Person Relay

This is a four-person relay! You can divide up the mileage in any way you would like. However, you can only exchange runners at our 5-mile aid stations. The most common is to have every teammate run 10 miles then switch; however, we have seen this broken up in a variety of ways as well.
Start Time:
6:30am MDT
End Time:
4:00pm MDT
Price:
$24.00 Race Fee + $3.43 SignUp Fee
Registration:
Price increases to $34.00 after April 1, 2026 at 11:59pm MDT
Sign Up

8-Person Women's Relay

This is an eight-person women's relay! Each teammate must run 5 miles! You cannot switch runners in the middle of a leg. It is okay, however, to only have 5 to 7 runners if you are unable to make a complete team. That just means that a few of your teammates will be running 10 or more miles. (If you only have 1 male, you are part of the Women's Relay, not the Co-ed Relay.)
Start Time:
6:45am MDT
End Time:
4:00pm MDT
Price:
$24.00 Race Fee + $3.43 SignUp Fee
Registration:
Price increases to $34.00 after April 1, 2026 at 11:59pm MDT
Sign Up

8-Person Men's Relay

This is an eight-person men's relay! Each teammate must run 5 miles! You cannot switch runners in the middle of a leg. It is okay, however, to only have 5 to 7 runners if you are unable to make a complete team. That just means that a few of your teammates will be running 10 or more miles. (If you only have 1 female, you are part of the Men's Relay, not the Co-ed Relay.)
Start Time:
6:45am MDT
End Time:
4:00pm MDT
Price:
$24.00 Race Fee + $3.43 SignUp Fee
Registration:
Price increases to $34.00 after April 1, 2026 at 11:59pm MDT
Sign Up

8-Person Coed Relay

This is an eight-person women's relay! Each teammate must run 5 miles! You cannot switch runners in the middle of a leg. It is okay, however, to only have 5 to 7 runners if you are unable to make a complete team. That just means that a few of your teammates will be running 10 or more miles. (You must have two males or two females to be considered a Co-ed Team, if you only have one male, you need to register for the Women's Relay, if you only have one female you need to register for the Men's Relay.)
Start Time:
6:45am MDT
End Time:
4:00pm MDT
Price:
$24.00 Race Fee + $3.43 SignUp Fee
Registration:
Price increases to $34.00 after April 1, 2026 at 11:59pm MDT
Sign Up

8-Person Family Relay

This is an eight-person Family relay! Each teammate must run 5 miles! You cannot switch runners in the middle of a leg. It is okay, however, to only have 5 to 7 runners if you are unable to make a complete team. That just means that a few of your teammates will be running 10 or more miles. All teammates must be related in one way or another.
Start Time:
6:45am MDT
End Time:
4:00pm MDT
Price:
$24.00 Race Fee + $3.43 SignUp Fee
Registration:
Price increases to $34.00 after April 1, 2026 at 11:59pm MDT
Sign Up

8-Person High School Girls Relay

This is an eight-person HS Girls relay! Each teammate must run 5 miles! You cannot switch runners in the middle of a leg. It is okay, however, to only have 5 to 7 runners if you are unable to make a complete team. That just means that a few of your teammates will be running 10 or more miles.
Start Time:
7:15am MDT
End Time:
4:00pm MDT
Price:
$24.00 Race Fee + $3.43 SignUp Fee
Registration:
Price increases to $34.00 after April 1, 2026 at 11:59pm MDT
Sign Up

8-Person High School Boys Relay

This is an eight-person HS Boys relay! Each teammate must run 5 miles! You cannot switch runners in the middle of a leg. It is okay, however, to only have 5 to 7 runners if you are unable to make a complete team. That just means that a few of your teammates will be running 10 or more miles.
Start Time:
7:15am MDT
End Time:
4:00pm MDT
Price:
$24.00 Race Fee + $3.43 SignUp Fee
Registration:
Price increases to $34.00 after April 1, 2026 at 11:59pm MDT
Sign Up

8-Person High School Coed Relay

This is an eight-person HS Coed relay! Each teammate must run 5 miles! You cannot switch runners in the middle of a leg. It is okay, however, to only have 5 to 7 runners if you are unable to make a complete team. That just means that a few of your teammates will be running 10 or more miles. (Having just 1 girl does not qualify for a Coed, you'd be in the HS Boys Division.)
Start Time:
7:15am MDT
End Time:
4:00pm MDT
Price:
$24.00 Race Fee + $3.43 SignUp Fee
Registration:
Price increases to $34.00 after April 1, 2026 at 11:59pm MDT
Sign Up

5-Mile Solo

This event is open to anyone who could not find a team, or cannot spend the day being with a team.
Start Time:
7:45am MDT
End Time:
4:00pm MDT
Price:
$24.00 Race Fee + $3.43 SignUp Fee
Registration:
Price increases to $34.00 after April 1, 2026 at 11:59pm MDT
Sign Up

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