Ch'aqu is a mountain in the Andes of Peru, about 5,000 metres (16,404 ft) high. It is located in the Cusco Region, Quispicanchi Province, Cusipata District. It lies northeast of Hatun Ch'aqu and Yanaqaqa and northwest of Yuraq Q'asa. Ch'aqu is situated on the left bank of the river Pukamayu which flows to the west as a right affluent of the Willkanuta River. The confluence is near Cusipata.