Araguaía River

The Araguaía River or, in Portuguese, Rio Araguaía is one of the major rivers of Brazil. It has a total length of about 2.600 km.

Like almost all large rivers, the Araguaía represents a whole fluvial system. Because of the vast number of tributaries, it is not easy to unambiguously define its source. Important tributaries originate in the Araras mountain range in Mato Grosso as well in the Divisões mountain range situated in Goiás. Along its course, the river forms the border between the Brazilian federal states of Goiás, Mato Grosso, Tocantins and Pará. Roughly in the middle of its course, the Araguaía splits into two forks that later reunite, thus forming the Ilha do Bananal, the world's largest river island. Close to the town of São João, the Araguaía River flows into the Tocantins River.