The IJssel, Lek, Amstel, Roer, and Yssel are all Dutch rivers. The IJssel is the longest river in the Netherlands, flowing from Germany to the IJsselmeer. The Lek is a distributary of the Rhine that flows through the Betuwe region of the Netherlands. The Amstel is a river in the province of North Holland, and is the main tributary of the IJsselmeer. The Roer is a river in the southeastern Netherlands, and is a tributary of the Meuse. The Yssel is a distributary of the IJssel, and flows through the provinces of Overijssel and Gelderland.