| Lake Mamacocha | |
| Pushpin Map: | Peru |
| Location: | Peru Huánuco Region |
| Coords: | -8.8542°N -76.9122°W[1] |
Lake Mamacocha (Quechua mama mother / madam, qucha lake, mama qucha ocean,[2] Mama Qucha) is a lake in Peru located in the Huánuco Region, Huacaybamba Province, Pinra District.[3] The river Pinra originates in or near the lake. It is an affluent of the Marañón River.