Yurajcocha (possibly from Quechua yuraq white, qucha lake, "white lake"), Tintayari or Huampuni (possibly from Aymara wampu boat, -ni, a suffix, "the one with a boat") is a lake in Peru located in the JunÃÂn Region, Huancayo Province, Chongos Alto District. It is situated at a height of approximately , about 5 km long and 0.84 km at its widest point. Yurajcocha lies north of Acchicocha and northeast of Huichicocha. The lake belongs to the watershed of the Mantaro River.
In 1999 the Yurajcocha dam was built at the northern end of the lake at . The dam is high. It is operated by Electroperu.