The Anduin is the largest river in Middle-earth. It comes out of the Grey Mountains and flows through Rhovanion and the Emyn Muil. There it goes through the rapids of Sarn Gebir and into the long lake Nen Hithoel, after which it falls down the Falls of Rauros. After that the river Anduin flows between the White Mountains and the Mountains of Shadow. It flows into the sea in a broad river delta, which is called the Mouths of Anduin or the Ethir Anduin.