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Idaho Mountain Trail Ultra Festival (IMTUF 100)

McCall, United States • 20-21 Sep 2025

The Idaho Mountain Trail Ultra Festival (IMTUF 100) is an annual mountain ultramarathon held near McCall, Idaho, featuring a 100-mile and a 20-mile race. The event takes place over two days in September, with the 100-mile race starting early Saturday morning and the 20-mile race on Sunday. Known for its challenging courses, IMTUF is a qualifier for both the Hardrock 100 and Western States 100, attracting serious ultrarunners seeking a demanding mountain adventure. Participants must be well-prepared, as the race involves significant commitment and risk. Registration opens in January, with a focus on safety, endurance, and mountain running expertise. Visit the organization's website for the most recent information.

United States Idaho McCall

Race information

Website Registration
100 mi
100 Miler
20 mi
20 Miler
Visit the organization's website for the most recent information.
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