The Vizcachas River is a river in the south of the Patagonic

Patagonia

Patagonia is a region located in Argentina and Chile, integrating the southernmost section of the Andes mountains to the southwest towards the Pacific ocean and from the east of the cordillera to the valleys it follows south through Colorado River towards Carmen de Patagones in the Atlantic Ocean...

 province

Provinces of Argentina

Argentina is subdivided into twenty-three provinces and one autonomous city...

 of Santa Cruz

Santa Cruz Province (Argentina)

Santa Cruz is a province of Argentina, located in the southern part of the country, in Patagonia. It borders Chubut province to the north, and Chile to the west and south. To the east is the Atlantic Ocean...

, Argentina

Argentina

Argentina , officially the Argentine Republic , is the second largest country in South America by land area, after Brazil. It is constituted as a federation of 23 provinces and an autonomous city, Buenos Aires...

. It is born at the Sierra de los Baguales, from the confluence of several streams, and descends from the Vizcachas Plain, flowing south until reaching a low-lying marsh

Marsh

In geography, a marsh, or morass, is a type of wetland that is subject to frequent or continuous flood. Typically the water is shallow and features grasses, rushes, reeds, typhas, sedges, other herbaceous plants, and moss....

 area. At the 51° S parallel

51st parallel south

The 51st parallel south is a circle of latitude that is 51 degrees south of the Earth's equatorial plane. It crosses the Atlantic Ocean, the Indian Ocean, the Pacific Ocean and South America....

, it turns abruptly west until reaching the border with Chile

Chile

Chile ,officially the Republic of Chile , is a country in South America occupying a long, narrow coastal strip between the Andes mountains to the east and the Pacific Ocean to the west. It borders Peru to the north, Bolivia to the northeast, Argentina to the east, and the Drake Passage in the far...

, which it follows and then crosses.

The Vizcachas, together with the Zanja Honda Stream and the Guillermo River, empty into the Serrano River

Serrano River

Serrano River is a river located in the Magallanes Region of Chile. Its main tributary is Grey River. The Serrano Glacier is an attraction on the river. The waters of the Serrano River eventually reach Seno Ultima Esperanza.-Area prehistory:...

, which ends in the Pacific Ocean

Pacific Ocean

The Pacific Ocean is the largest of the Earth's oceanic divisions. It extends from the Arctic in the north to the Southern Ocean in the south, bounded by Asia and Australia in the west, and the Americas in the east.At 165.2 million square kilometres in area, this largest division of the World...

.