The Cuiabá River is a Brazil

Brazil

Brazil , officially the Federative Republic of Brazil , is the largest country in South America. It is the world's fifth largest country, both by geographical area and by population with over 192 million people...

ian river in the southern state of Mato Grosso

Mato Grosso

Mato Grosso is one of the states of Brazil, the third largest in area, located in the western part of the country.Neighboring states are Rondônia, Amazonas, Pará, Tocantins, Goiás and Mato Grosso do Sul. It also borders Bolivia to the southwest...

 that flows in the Rio de la Plata Basin.

At Cuiabá

Cuiabá

Under the Koppen climate classification, Cuiaba features a tropical wet and dry climate. Cuiabá is famous for its searing heat, although temperatures in winter can arrive sporadically at 10 degrees, indeed atypical, caused by cold fronts coming from the south, and that may only last one or two...

 it's lower portion enters the Pantanal

Pantanal

The Pantanal is a tropical wetland and one of the world's largest wetland of any kind. Most of it lies within the Brazilian state of Mato Grosso do Sul, but it extends into Mato Grosso and portions of Bolivia and Paraguay, sprawling over an area estimated at between and...

 ecosystem and region, flowing through extensive and important Ramsar Convention

Ramsar Convention

The Ramsar Convention is an international treaty for the conservation and sustainable utilization of wetlands, i.e., to stem the progressive encroachment on and loss of wetlands now and in the future, recognizing the fundamental ecological functions of wetlands and their economic, cultural,...

 protected wetlands for waterfowl

Waterfowl

Waterfowl are certain wildfowl of the order Anseriformes, especially members of the family Anatidae, which includes ducks, geese, and swans....

, migratory birds, and other wildlife. It flows through the Pantanal Matogrossense National Park

Pantanal Matogrossense National Park

The Pantanal Matogrossense National Park is a national park of Brazil, in the southern state of Mato Grosso.The park is in the Pantanal, a World Heritage Site and a Ramsar Convention significant wetlands habitat. The Cuiabá River runs through Pantanal Matogrossense National Park....

 here.

Length:

• 828 km
• 515 miles

Confluence
The river is joined by the São Lourenço River

São Lourenço River (Mato Grosso)

The São Lourenço River is a tributary of the Paraguay River within the Pantanal, an alluvial plain that spans portions of Brazil, Bolivia and Paraguay. The São Lourenço river basin lies in the Mato Grosso state of Brazil.-See also:...

. After their confluence

Confluence

Confluence, in geography, describes the meeting of two or more bodies of water.Confluence may also refer to:* Confluence , a property of term rewriting systems...

 the subsequent river continues to be named the Cuiabá River on most maps. The Cuiabá River is a tributary of the Paraguay River

Paraguay River

The Paraguay River is a major river in south central South America, running through Brazil, Bolivia, Paraguay, and Argentina...

—Río Paraguai, which is a primary tributary of the major South American Río de la Plata

Río de la Plata

The Río de la Plata —sometimes rendered River Plate in British English and the Commonwealth, and occasionally rendered [La] Plata River in other English-speaking countries—is the river and estuary formed by the confluence of the Uruguay River and the Paraná River on the border between Argentina and...

.

See also

• La Plata Basin
  La Plata Basin
  The Río de la Plata Basin , sometimes called the Platine basin or Platine region, is the name given to the hydrographical area that covers parts of Argentina, Brazil, Bolivia, Paraguay and Uruguay...
  
  
• Tributaries of the Río de la Plata