The Wiese is a river in Baden-Württemberg, Germany, and Basel-City, Switzerland, a right tributary of the Rhine. It rises in the Black Forest, on the Feldberg. The Wiese flows through Todtnau, Schönau im Schwarzwald, Schopfheim and Lörrach. After crossing the border with Switzerland, the Wiese flows through the quarters of Basel on the right side of the Rhine, and joins the Rhine opposite the French town Saint-Louis. Its length is 55 km.