Idaho Mountain Trail Ultra Festival (IMTUF 100)
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Event Details
The 15th annual Idaho Mountain Trail Ultra Festival (IMTUF) 100 races take place on September 19-20, 2026. The event starts and finishes at Jug Mountain Ranch, south of McCall, Idaho.
Distances
The event features two races:
- 100 Miler - Starts on Saturday.
- 20 Miler - Starts on Sunday.
Course and Qualifiers
The courses are the same as in previous years. The race is a qualifier for both the Hardrock 100 and Western States 100 ultramarathons. Organizers describe it as a "mountain adventure run" with significant commitment required. They caution that aid can be many miles and hours away during the race and strongly urge participants to focus on this event itself.
Registration and Policies
Registration opens on January 2, 2026. A refund policy is in effect: 50% of the entry fee is refundable until July 1, 2026. After that date, there are no refunds, and bibs cannot be rolled over or transferred. In the event of a race cancellation due to factors like wildfire or severe weather, no refunds or rollovers will be issued. Visit the organization's website for the most recent information.
