Cantumayo (possibly from Quechua qantu, qantus, qantuta a plant (Cantua buxifolia), mayu river,[1]) is a river in Peru located in the Arequipa Region, Caylloma Province, Coporaque District.

[2] It originates in the Chila mountain range southeast of the mountain Mismi.

Its direction is mainly to the south where it meets Colca River as a right affluent.

The confluence is north of the town Coporaque.

This article related to a river in Peru is a stub.