Ultra Running Hub Idaho Falls, ID, United States · Saturday, June 27, 2026
Fixed Distance 50 mi
To Bone and Back 40-Mile Ultra Marathon
Race completed
64 km Distance
not publishedn/a Climbing
3.2 est Grit · Challenging
Calculated from 64 km alone — the organiser has not published an elevation profile. Read 3.2 as a floor, not a verdict.
What the course asks
Field size ~12 Tiny. You will run alone for most of it.
DUV results for the 2026 edition (40mi) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.
Typical conditions, June
Daytime high 24°C
Night low 9°C
Rainfall Mostly dry
Daylight 15 h 24 m of light
Regional 2001-2020 average for June — NASA POWER, grid elevation 1673 m. Not a forecast.
The Aid Station
Course-specific beta from the community
With road terrain, choose a shoe with moderate cushioning for optimal performance.
Gear for this race
Chosen for 64 km of road.
- Trail Running Shoes64 km of road — cushioning that is still there in the last quarter.
- Race Nutrition64 km of self-supported fuelling between aid stations.
- Hydration VestsFlask capacity for 64 km, without the bounce.
- GPS WatchesBattery life first — a 64 km day outlasts most full-GPS modes.