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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 a challenging mountain ultramarathon held annually near McCall, Idaho, starting and finishing at Jug Mountain Ranch. The 2025 event, marking its 14th year, features a 100-mile race beginning Saturday and a 20-mile race on Sunday. Known for its rugged, remote course, IMTUF demands serious preparation and commitment, offering a true mountain adventure with significant risks for the unprepared. The race serves as a qualifier for prestigious events like Hardrock 100 and Western States 100, emphasizing its difficulty and prestige. Participants should be ready for a demanding experience far from immediate help. 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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