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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 14th edition in 2025 features a 100-mile race beginning Saturday morning and a 20-mile race on Sunday. Known for its rugged, remote terrain, IMTUF offers a true mountain adventure with significant physical and mental demands, making it suitable only for well-prepared ultrarunners. The course serves as a qualifier for prestigious events like Hardrock 100 and Western States 100. Participants should be ready for long hours far from aid, emphasizing safety and commitment in this high-stakes race environment. 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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