Gagamachay or Qaqa Mach'ay (Quechua qaqa rock, mach'ay cave, "rock cave", also spelled Gagamachay) is a mountain in the Andes of Peru which reaches a height of approximately . It is located in the Ancash Region, Huari Province, on the border of the districts of Anra and Huacachi, and in the Huánuco Region, Huamalíes Province, Singa District.
References escale.minedu.gob.pe - UGEL map of the Huamalíes Province (Huánuco Region)