Lake Rajucocha (possibly from Quechua rahu snow, ice, mountain with snow, qucha lake) is a lake in Peru located at a height of about in the Ancash Region, Huaylas Province, Santa Cruz District. The lake is 1.1 km long, 0.58 km wide, and has an area of 0.54 km<sup>2</sup>. Lake Rajucocha lies in the Cordillera Blanca, west of Santa Cruz Norte.