The Saint Croix National Scenic Riverway is a federally protected system of riverways located in eastern Minnesota and northwestern Wisconsin. It protects 252 miles of river, including the St. Croix River (on the Wisconsin/Minnesota border), and the Namekagon River (in Wisconsin), as well as adjacent land along the rivers. The St. Croix National Scenic Riverway is one of the original eight National Wild and Scenic Rivers, largely as a result of legislation by senators Walter Mondale of Minnesota and Gaylord Nelson of Wisconsin.