IMTUF 100 - Idaho Mountain Trail Ultra Festival
⚠️ 2027 edition: provisional information
The date is estimated from the 2026 edition (September 19, 2026), on the same day of the week. Courses, start times, fees and description are carried over from the previous edition: check them on the official website. This page will be updated as soon as the organizer publishes them.
Available distances
About
IMTUF 100 - Idaho Mountain Trail Ultra Festival is held in McCall, Idaho, on September 19–20, 2026. Two trail formats are on the program: the 100-mile starting on Saturday, September 19 at 6:00 a.m., and a 20-mile on Sunday, September 20 at 9:00 a.m. McCall sits in Idaho's mountains, and the name of the event, an acronym for Idaho Mountain Trail Ultra Festival, sets the tone.
The 100-mile is a mountain ultra for experienced runners, ideally with a prior 100K or 100-mile finish, comfortable with long climbs, night running and self-management over a day and a half. The 20-mile on Sunday is the accessible option: long enough to be a real mountain trail challenge, short enough for runners who have done a trail half marathon. For the 100, a 20-week plan with back-to-back long weekends, hiking practice and a crew or pacer plan is the standard approach. For the 20-mile, 12 weeks with weekly hill work and a long trail run will do.
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Races nearby
Other upcoming races around McCall.