Hatun Ch'aqu (Quechua hatun big, ch'aqu a fine, whitish, edible and medicinal clay,[2] Hispanicized spelling Jatunchajo) is a mountain in the Andes of Peru, about 5,000 metres (16,404 ft) high.

It is located in the Cusco Region, Canchis Province, Pitumarca District, and in the Quispicanchi Province, Cusipata District.

An intermittent stream originates east of the mountains Hatun Ch'aqu and Tuqtu.

Its waters flow to the river Ch'illkamayu in the south.

This Cusco Region geography article is a stub.