After the great crossing of Fitz Roy, in Patagonia, and the Nose in less than 2 hours, in Yosemite, Alex Honnold and Tommy Caldwell embark on a new adventure: the Continental Divide Ultimate Linkup (CDUL), i.e. the chain of 17 summits of Rocky Mountain National Park, in Colorado in 36 hours. The CDUL totals 56 kilometres, 6,000 meters of elevation gain and 65 pitches, with 11 routes from 5a to 6b+ climbed in simultaneous climbing. A project by Adam Stack, Caldwell's childhood friend, who gave the iconic American rope a hard time.