Idaho Mountain Trail Ultra Festival (IMTUF 100)
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Idaho Mountain Trail Ultra Festival (IMTUF 100) : McCall, Idaho
The Idaho Mountain Trail Ultra Festival is a multi-distance mountain running event held at Jug Mountain Ranch, just south of McCall, Idaho. The 2026 edition is the fifteenth annual running and uses the same courses as in previous years. Race dates are September 19 and 20, 2026. Registration opens January 2, 2026 and closes September 13, 2026 at 11:59 PM PT.
Distances offered:
- 100 Miler
- 20 Miler
Organizers describe the event as a committing, post-graduate level mountain race where participants can be many miles and many hours away from help. For 2026, IMTUF continues to be a Hardrock 100 qualifier and is also a Western States 100 qualifier. The races start and finish at Jug Mountain Ranch.
The published refund policy states a 50 percent refund is available until July 1, 2026 at 11:59 PM. After that date there are no refunds, and there are no bib rollovers or transfers. If the race is cancelled for reasons such as fire or severe weather, organizers state refunds or rollovers will not be possible. The organizers invite individuals facing personal financial hardship to contact them. Visit the organization's website for the most recent information.
