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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 ultra-running event held in McCall, Idaho, featuring a challenging 100-mile race and a 20-mile race. The festival emphasizes adventure running in mountainous terrain, making it suitable for experienced ultrarunners. IMTUF serves as a qualifier for prestigious races like the Hardrock 100 and Western States 100. Participants are advised to be fully prepared for the demanding conditions, as the race is known for its serious nature and remote location. Registration opens on January 2, 2024, for the 2025 event, which takes place on September 20-21. 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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