The Pellegrini Lake is an artificial lake located on the Argentinian Patagonia, in the province of Río Negro, near the city of Cinco Saltos, at approximately 38°40′S 68°00′W and 270 m above mean sea level.
This reservoir was originally a natural depressed area, possibly excavated by wind erosion, which was later filled with water brought by a derivation channel from the nearby Neuquén River, in order to regulate its flow. It has mean and maximum depths of 9.4 and 18 m, respectively. It covers an area of 112 km² and has a volume of 1.053×109 m³.
The lake is employed for commercial fishing of trucha criolla and pejerrey, as well as sport fishing, recreation and tourism.
Wikipedia https://en.wikipedia.org/wiki/Pellegrini_Lake
Coordinates -38°41'35.804" N -68°0'0.482" E