Chopicalqui, North Ridge, 1977. The French climbers A. Bouyssière, J. Lacaze and Ch. Mourembles climbed Chopicalqui from the north. They fixed 2000 feet of rope on the difficult rocks of the northeast spur of the lower buttress up to about 18,700 feet on July 20 to 22, 1977. From there, about 650 feet below the junction with the main ridge, it was mixed climbing or snow and ice. They went alpine style from the top of the fixed ropes and got to the top in three days, on July 26, 1977. They descended the normal route.