Gasherbrum IV close up at sunrise from Concordia. On June 22, 1986 Greg Child, Tim Mcartney-Snape, and Tom Hargis climbed to the North Summit and traversed 450m horizontally to the true Gasherbrum IV Summit, completing the first ascent of the Gasherbrum IV Northwest Ridge. ‘We functioned as a single being. Now on the summit, that being, drunk with euphoria, felt suddenly as if it had been merged with sky and mountain as well to become a single, elemental entity.’ - Thin Air: Encounters In The Himalaya by Greg Child.