The Limay River is an important river in Patagonia. It begins at the eastern end of the Nahuel Huapi Lake and flows for approx. 380 km. and finally meets the Neuquén River which then becomes the Río Negro. The city of Neuquén is located at this juncture. The river's deep waters are clear and are used to generate hydroelectricity at the five dams built on its course, contributing to more than a quarter of the total hydroelectric generation in the country. The river is used for fly fishing, and in some points its banks are suitable as beach resorts, with facilities for camping.This river has been covered with volcanic ash, as the volcano Puyehue has been erupting since 2011.