The Paranaíba river is the most important source of the Paraná river, her source lies in the serra (mountains) of Mata da Corda, municipality "Rio Paranaiba" (Mato Grosso) at a height of 1,148 metres (3,766 ft). On the other side of these serra is the source of the Abaete, a tributary of the São Francisco. The confluence of the Paranaíba with the Grande river is situated about 1,000 kilometres (620 mi) from the source of the Paranaíba.