Lake Arhuaycocha is a lake in Peru, in the Ancash Region, Huaylas Province, Santa Cruz District.escale.minedu.gob.pe - UGEL map of the Huaylas Province (Ancash Region) showing "Nevado Pucahirca" and west of it the small river Arhuaycocha which flows south of the lake It is at the foot of the mountains Pucajirca and Rinrijirca and the Arhuay glacier.
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