Erui was a river in Gondor. This swift-flowing river began near Mindolluin in the White Mountains, flowing south through the province of Lossarnach, where it met the Anduin about 75 miles south of Minas Tirith. Of old, it was part of the border between Anórien and Lebennin.
The main road from Minas Tirith to Pelargir crossed the Erui at the Crossings of Erui.
