Idaho Mountain Trail Ultra Festival (IMTUF 100)

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. Scheduled for September 20-21, 2025, the event starts and finishes at Jug Mountain Ranch, offering participants a rugged mountain adventure. IMTUF is a qualifier for prestigious races like the Hardrock 100 and Western States 100, making it a sought-after challenge for serious ultrarunners.

The festival emphasizes the importance of preparation and commitment, as the remote mountain terrain presents significant challenges for those unprepared. Registration opens on January 2, 2025. Visit the organization's website for the most recent information.