The Xingu River (Portuguese: Rio Xingu, Portuguese pronunciation: [ɕĩˈɡu], /ʃiːŋˈɡuː/ sheeng-GOO) is a 1,640 km (1,019 mi)[1] river in north Brazil. It is a southeast tributary of the Amazon River and one of the largest clearwater rivers in the Amazon basin,[2] accounting for about 5% of its water.[3]