The International Selkirk Loop is a scenic highway in the U.S. states of Idaho and Washington, as well as the Canadian province of British Columbia. The loop encircles the Selkirk Mountain Range, and offers several side trips aside from the main route. Included on the loop is the Kootenay Lake Ferry, the longest free ferry in the world. The portion of the loop in the United States has been designated an All-American Road by the United States Department of Transportation.