Idaho Mountain Trail Ultra Festival (IMTUF 100)

SEP

19-20

2026

IMTUF 100 in McCall, Idaho runs September 19 to 20, 2026 from Jug Mountain Ranch with 100 mile and 20 mile options. The race is a Hardrock and Western States qualifier and emphasizes remote mountain running and self reliance.

19-20 Sep 2026

McCall, Idaho

Website

100 miles 20 miles

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IMTUF 100 - Idaho Mountain Trail Ultra Festival

The IMTUF 100 is the 15th annual mountain ultrarunning event held September 19 to 20, 2026. Courses start and finish at Jug Mountain Ranch, just south of McCall, Idaho. The organizer will use the same courses that have been used in previous years.

The event offers two distance options. It is a qualifier for both the Hardrock 100 and the Western States 100; IMTUF has been a Hardrock qualifier since 2012. The race is described by the organizer as mountain adventure running that places runners many miles and many hours away from help. Entrants should expect a committing course and should plan accordingly.

Registration opens January 2, 2026 and registration closes September 13, 2026 at 11:59 PM PT. The refund policy specifies a 50 percent refund of the entry fee until July 1, 2026 at 11:59 PM. After July 1 there are no refunds, and there will be no rollover or transfer of bibs. If the event is cancelled for reasons such as fire or severe weather the organizer states there will be no refund or rollover. The organizer requests that those facing personal financial hardship contact event staff. Visit the organization's website for the most recent information.