In mid-September, American Colin Haley, 38, added another impressive solo ascent to his long list of ground-breaking alpine climbs (both roped and unroped). During an impromptu late-winter trip to Patagonia, in a round-trip of around 21 hours, Haley climbed the Supercanaleta route on Cerro Chaltén (Fitz Roy), the first time this 1,600-meter climb has been soloed in winter. And by solo, we really mean alone: Haley never saw another climber during his five trips into the high mountains. In this episode, Michael Levy quizzes Haley not only about the physical aspects of such a difficult, lonely climb, but also the psychological ups and downs of soloing in winter.

The Cutting Edge is presented by Hilleberg the Tentmaker, with additional support from Gnarly Nutrition, Lowa Boots, and Polartec. This podcast is produced by the American Alpine Club.