Must meet custom qualifier requirements within the qualification window
Qualifying window for 2027: Through January 03, 2027
Submission deadline: January 03, 2027
UTMB Running Stones (UTMB Index) qualification required. Runners must meet the minimum Running Stone threshold set by UTMB World Series for 100M events. Qualification window closes January 3, 2027. Check utmb.world/my-utmb-index for current eligibility.
