 Chillcamayu originates in the Vilcanota mountain range between the mountains Jatunhuma in the north-west and Huayruro Punco in the south-east.It crosses the Pitumarca District from north-east to south-west along the villages of Jampa, Chillca and Pitumarca.One of its main tributaries from the left is Yanamayo (Quechua for "black river").