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. IMTUF is recognized as a qualifier for prestigious races like the Hardrock 100 and Western States 100, making it a sought-after challenge for serious ultrarunners.

Participants should be well-prepared for the demanding mountain terrain, as the race is known for its adventurous and unpredictable nature. Registration opens on January 2, 2025, with a strict refund policy in place. Visit the organization's website for the most recent information.