The highway begins at an intersection with
WIS 72 and runs north from it, following the
Eau Galle River until its intersection with County Trunk Highway B (CTH-B), from which it continues north. It passes through intersections with
WIS 29 and CTH-N and an interchange with
Interstate 94 (I-94) before intersecting with
US Highway 12 (US 12) near
Hersey and
Wilson. It then continues north before curving eastward to meet
WIS 170 in
Glenwood City. From there it runs north until it terminates at
WIS 64. ==History==