To Bone and Back Relay

Sat, Jun 27, 2026, 5:30 AM MDT

Location: Idaho Falls, ID; 4941 1st St, 83401
Type: ULTRA

Vibe analysis coming soon

Course feel, difficulty, and community fit are being added to this listing. Check back, and always confirm details on the official registration page.

Distances & registration

11 options

Registration for all distances is through the official signup link above.

5 Miles
Sat, Jun 27, 7:45 AM MDT · From $26.44
Opens Feb 2, 2026, 8:24 AM MST · Closes Apr 1, 2026, 7:59 PM MDT
40 Miles
Sat, Jun 27, 5:30 AM MDT · From $48.70
Opens Feb 2, 2026, 5:57 AM MST · Closes Apr 1, 2026, 7:59 PM MDT
40 Miles
Sat, Jun 27, 5:30 AM MDT · From $27.50
Opens Feb 2, 2026, 5:57 AM MST · Closes Apr 1, 2026, 7:59 PM MDT

+ 8 more options

40 Miles
Sat, Jun 27, 6:30 AM MDT · From $26.44
Opens Feb 2, 2026, 5:57 AM MST · Closes Apr 1, 2026, 7:59 PM MDT
40 Miles
Sat, Jun 27, 6:45 AM MDT · From $26.44
Opens Feb 2, 2026, 5:57 AM MST · Closes Apr 1, 2026, 7:59 PM MDT
40 Miles
Sat, Jun 27, 6:45 AM MDT · From $26.44
Opens Feb 2, 2026, 5:57 AM MST · Closes Apr 1, 2026, 7:59 PM MDT
40 Miles
Sat, Jun 27, 6:45 AM MDT · From $26.44
Opens Feb 2, 2026, 5:57 AM MST · Closes Apr 1, 2026, 7:59 PM MDT
40 Miles
Sat, Jun 27, 6:45 AM MDT · From $26.44
Opens Feb 2, 2026, 5:57 AM MST · Closes Apr 1, 2026, 7:59 PM MDT
40 Miles
Sat, Jun 27, 7:15 AM MDT · From $26.44
Opens Feb 2, 2026, 5:57 AM MST · Closes Apr 1, 2026, 7:59 PM MDT
40 Miles
Sat, Jun 27, 7:15 AM MDT · From $26.44
Opens Feb 2, 2026, 5:57 AM MST · Closes Apr 1, 2026, 7:59 PM MDT
40 Miles
Sat, Jun 27, 7:15 AM MDT · From $26.44
Opens Feb 2, 2026, 5:57 AM MST · Closes Apr 1, 2026, 7:59 PM MDT

Vibe Check

Push Potential

Based on terrain, weather, and distance data.

The course

From the organizer

This 40 mile relay has been around in Southeast Idaho for 34 years now. Join today and run with a team of 8 (each person running 5 miles), a team of 4 (10 miles each), a team of 2 (20 miles each) or if you are feeling adventurous run the whole 40 miles!!! Come out with friends and/or family to enjoy a great event and great prizes!

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