High Quality Content by WIKIPEDIA articles! State Trunk Highway 13 (often called Highway 13, STH 13 or WIS 13) is a Wisconsin state highway running north–south across northwest and central Wisconsin. WIS 13 serves as a major north–south route connecting the communities of Wisconsin Dells, Wisconsin Rapids, Marshfield and Ashland. Highway 13 is part of the Lake Superior Circle Tour from its northern/western terminus to Ashland at is eastern junction with U.S. Highway 2. The road also provides access to the Apostle Islands National Lakeshore off the Lake Superior shoreline at Bayfield. The highway is two-lane surface road with the exception of various urban multilane road sections.