Dos Matos River River in BrazilDos Matos RiverLocationCountryBrazilPhysical characteristicsSource • locationPiauí state The Dos Matos River is a river of Piauí state in northeastern Brazil. See also[edit] List of rivers of Piauí References[edit] Brazilian Ministry of Transport[dead link] This article related to a river in Piauí, Brazil is a stub. You can help Wikipedia by expanding it.vte