Near Lake Wisconsin, the highway turns east and then back north before sticking to an eastward course along a bend in the river. At the intersection with WIS 113 near the Merrimac Ferry, WIS 188 terminates.
Near Lake Wisconsin, the road turns east and then back north before continuing eastward along a bend in the river. At the intersection with WIS 113 near the Merrimac Ferry, WIS 188 ends.