Its eastern terminus is at an intersection with U.S. Highway 218, Iowa Highway 27, and Iowa Highway 58 in Cedar Falls. It currently follows much of U.S. Highway 20's old route from Cedar Falls to Iowa Falls.
Its eastern endpoint is found where U.S. Highway 218, Iowa Highway 27, and Iowa Highway 58 converge in Cedar Falls. It largely tracks the former route of U.S. Highway 20 from Cedar Falls to Iowa Falls.