Thirty feet down a dark, icy crevasse, Tyler Willis never gave up hope that he would be rescued. That he was eventually pulled from the depths of the Teton Glacier by his climbing partner and two passersby after more than an hour of rope rigging is testament to the value of companion rescue.

The harrowing tale from August 8, 2020, includes two chapters: the fall and complicated extrication from the crevasse, and how Jenny Lake climbing rangers eventually got Willis off the mountain.