Ruhr, << roor, >> River rises in Westphalia, Germany, and flows 144 miles (232 kilometers) through the famous industrial region of the Ruhr Valley. It joins the Rhine River near Duisburg. See Ruhr .
Another Ruhr (Roer) River rises on the Belgian frontier and flows north through Germany for 67 miles (108 kilometers). It enters the Maas (Meuse) River at Roermond, the Netherlands.
