Acre River

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The Acre River (Rio Acre) is a 650 km long river in central South America. The river rises in Peru, and runs eastwards, forming part of the border between Bolivia and Brazil. It runs through the Brazilian states of Acre and Amazonas before eventually running into the Purus River.

It is navigable from the mouth until the Chapury River (480 km), even farther in the wet season from January until May. The river was an important transportation artery at the end of the 19th Century due to newly discovered rubber tree forests.