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Idaho Mountain Trail Ultra Festival (IMTUF 100)

McCall, United States • 20-21 Sep 2025

IMTUF 100, the Idaho Mountain Trail Ultra Festival, returns for its 14th edition, based at Jug Mountain Ranch just south of McCall, Idaho. The festival offers two distances: a 100-mile ultramarathon and a 20-mile race, forming a challenging weekend of mountain trail running. The course uses the same routes as in prior years, highlighting rugged, high-alpine terrain and remote miles with limited outside support.

IMTUF is described as a serious, high-commitment event with a postgraduate-level challenge and adventure. It is a Hardrock 100 and Western States 100 qualifier, underscoring its competitive prestige and commitment expectations. The atmosphere is demanding yet renowned for its supportive ultrarunning community. 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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