Milluni (Aymara millu light brown, reddish, fair-haired, dark chestnut, -ni suffix to indicate ownership, "the one that has got a brown colour") is a lake on the western side of the Cordillera Real of Bolivia located in the La Paz Department, Pedro Domingo Murillo Province, El Alto Municipality, north of El Alto. The lake is situated at a height of 4,565 metres (14,977 ft) south of the mountain Wayna Potosí, at the foot of Chacaltaya. It is about 1.83 km long and 1 km at its widest point. The surface is 2.37 km² (0.92 sq mi). At the south side there is a dam.