The Rut Trifecta is exactly what it sounds like—three mountain races in three days, each tackling the mighty Lone Peak. Athletes take on the Vertical Kilometer, the 28K, and the 50K for a total of 84 kilometers (52.5 miles) and a lung-crushing 21,700 feet of elevation gain. That’s three summits, three start lines, and three opportunities to push your limits.

This challenge is designed for those who think more vert equals more fun—or who embrace a little masochism in the mountains. By the time you finish, you’ll know every line up Lone Peak, and Lone Peak will know you.