Lake Mamacocha (Quechua mama mother / madam, qucha lake, mama qucha ocean,Teofilo Laime Acopa, Diccionario Bilingüe, Iskay simipi yuyay k'ancha, Quechua – Castellano, Castellano – Quechua Mama Qucha) is a lake in Peru located in the Huánuco Region, Huacaybamba Province, Pinra District.escale.minedu.gob.pe - UGEL map of the Huacaybamba Province (Huánuco Region) showing "Lago Mamacocha" The river Pinra originates in or near the lake. It is an affluent of the Marañón River. References