Chopicalqui. On July 1 Walter Herrmann, Jack Hickman, Robert Kyrlach, David Mattox and I from Albuquerque and Hermann Denk of Munich, Germany were trucked up to the Llanganuco Lakes and headed toward the Portachuelo, leaving the pack trail where it crosses the drainage from Huascarán and Chopicalqui. Camp I was in this valley at 14,500 feet and II at the top of the west moraine of the Chopicalqui glacier. Our high camp was just below the ridge at 18,500 feet. On July 9 Mattox, Herrmann and Denk made a second attempt and reached the summit (20,998 feet) in the early afternoon. New snow and unsettled weather forced us to abandon plans for the ascent of Chopicalqui, and of other peaks, by the remainder of the team.
Daniel P. Petersen, New Mexico Mountain Club