Yanaqucha (Quechua yana black, very dark, qucha lake, black lake, Hispanicized spelling Yanacocha) is a lake in the Cordillera Blanca in the Andes of Peru located in the Ancash Region, Huari Province, Chavín de Huantar District. It is situated at a height of about , about long and at its widest point. It has a depth of about . Yanaqucha lies in the Chacpar gorge north-west of Chavín de Huantar belonging to the Huascarán National Park. It supplies the local people with drinking water.