Asana River (Río Asana) is a waterway in the Moquegua Region of southern Peru. It is one of the tributaries of the Osmore River (also known as Moquegua or Tumilaca). The Asana archaeological site, occupied over the course of 8,000 years, is situated in a basin on the river's north bank. The Quellaveco mining project sought to divert the Asana for extractive waste material placement in its copper mining operations.