To Bone and Back
The course for the Bone and Back is an Out and Back route that is ALL ON PAVEMENT. Aid Stations every 5 miles are stocked with water, pops, chips, pickles, candy, etc... for the ultra runners. Every 2.5 miles in between the main 5 mile stations there is also a table with water.
Not your typical Ultramarathon! This is a rugged out-and-back road race that pushes runners deep into remote parts of Idaho—and then demands they earn every mile back. Expect long climbs, relentless descents, exposed sections, and big mental tests. This is a true endurance challenge where pacing, preparation, and grit matter just as much as fitness.
Upcoming Races
Jun 27 2026
40 Miles
3,000
3,000
ft.
Out and Back
3
Elevation Rating
Hilly, ~2500-7500 feet in 50 miles
2
Surface Rating
Mostly groomed trail or dirt roads
Results
40 Miles
| Date | Finishers | Top Result (F) | Top Result (M) |
|---|---|---|---|
| 06/28/25 | 14 | 6:23:29 | 4:55:19 |
| 06/22/24 | 5 | 6:33:53 | 6:44:41 |
| 06/24/23 | 7 | 7:05:37 | 6:56:09 |
| 06/25/22 | 2 | 7:31:14 | |
| 06/26/21 | 5 | 9:53:37 | 6:48:40 |
| 06/27/20 | 11 | 6:24:24 | 5:19:03 |
| 06/22/19 | 6 | 9:05:27 | 6:57:52 |
| 06/23/18 | 5 | 7:37:21 | 4:58:12 |
| 06/24/17 | 6 | 6:02:25 | 5:53:28 |
| 06/25/16 | 7 | 6:10:54 | 5:44:30 |
| 06/27/15 | 8 | 7:16:37 | 7:09:16 |
| 06/28/14 | 6 | 6:55:10 | 5:48:10 |
| 06/23/12 | 13 | 7:51:24 | 5:37:00 |
| 06/25/11 | 10 | 7:47:46 | 5:53:23 |