15th Idaho Mountain Trail Ultra Festival (IMTUF 100)
15th Idaho Mountain Trail Ultra Festival (IMTUF 100) is a 161 km ultramarathon in Burgdorf, ID, United States, taking place on Sep 19 – Sep 20, 2026.
- Date
- Sep 19 – Sep 20, 2026
- Distance
- 161 km
- Elevation gain
- 6706 m
- Location
- Burgdorf, ID, United States
- Format
- Fixed distance