UTMB Mont-Blanc (Ultra-Trail du Mont-Blanc)

UTMB is the 100-mile race of the UTMB World Series Finals, and most bibs are allocated through a single winter lottery it shares with the CCC and OCC. To enter, you need a valid UTMB Index in the 100K or 100M category and at least one Running Stone earned in the previous two years. Running Stones are credits for finishing UTMB World Series races (more for longer distances, double at Majors), and each stone you hold is one more chance in the draw; if you miss out you keep them for the next lottery, and the count resets to zero once you win a place.