IMTUF 100 - Idaho Mountain Trail Ultra Festival

15TH ANNUAL IMTUF 100 RACES

Registration opens on January 2nd, 2026. We will run the same courses as we have in years past, starting and finishing at Jug Mountain Ranch, just south of McCall. Race dates are September 19-20, 2026.

The 100 mile starts on Saturday at 6AM, the 20 mile starts SUNDAY at 9AM.

Refund Policy: 50% refund until July 1st, 2026. No refunds, rollovers, or transfers after July 1st. In case of cancellation due to fire or severe weather, there are no refunds or rollovers.

Qualifiers: For 2026, IMTUF will continue to be a Hardrock 100 qualifier, and a Western States 100 qualifier.

Warning: This is a serious mountain adventure race with significant commitment and potential for adventure and uncertainty. It is not appropriate for those seeking an experience without challenges.

Start Times

• 100 Miler: Sat 6:00 AM
• 20 Miler: Sun 9:00 AM