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. Visit the organization's website for the most recent information.