Palcacocha is a glacier lake in the Andes mountain range of South America in northwestern Peru located in the Ancash Region, Huaraz Province.

Ancash is a department and region in western Peru. It is bordered by the departments of La Libertad on the north, Huánuco and Pasco on the east, Lima on the south, and the Pacific Ocean on the west. Its capital is the city of Huaraz, and its largest city and port is Chimbote. The name of the region originates from the Quechua word anqash, from anqas ('blue') or from anka ('eagle').