<Tr> <Td> - average </Td> <Td> 1,530 m / s (54,030 cu ft / s) </Td> </Tr> <Tr> <Td_colspan="2"> Map of the Amazon Basin with the Guaporé River highlighted </Td> </Tr> <P> Guaporé River (Portuguese: Rio Guaporé) is a river in western Brazil and northeastern Bolivia . Its Bolivian name is Río Iténez . It is 1,530 km (950 mi) long; 970 km (600 mi) of the river forms the border between Brazil and Bolivia . </P> <P> The Guaporé River is part of the Madeira River basin, which eventually empties into the Amazon River . The Guaporé River crosses the eastern part of the Beni savanna region . It forms the border of the 615,771 hectares (1,521,600 acres) Guaporé Biological Reserve, and is fed by rivers originating in the reserve, the São Miguel, Branco, São Simão, Massaco and Colorado . </P>

South american river also known as rio itenez in bolivia