The Cordillera La Viuda is about 130 km long, trending northwesterly between lat 10°33' and 11°37'S. and long 76°07' and 76°42'W. It consists of small groups of ice-covered mountains. All of the glaciers are mountain glaciers and cover an area of 28.5 km². Drainage is westward into the Pacific Ocean by Río Huaura, Río Chancay, Río Chillón, and Río Rímac and eastward to the Atlantic Ocean by means of Río Huallaga and Río Mantaro. The highest peak in the range is the Nevado Alcoy at 5,780 m asl.