High Quality Content by WIKIPEDIA articles! Wisconsin Highway 57 (often called Highway 57, STH 57 or WIS 57) is a 191.82 miles (308.70 km) state highway in the U.S. state of Wisconsin. It runs from its southern terminus at Wisconsin Highway 59 in Milwaukee to its northern terminus at Wisconsin Highway 42 in Sister Bay. Much of WIS 57 parallels the Interstate 43 corridor, and the highway is concurrent with I-43 for 12 miles (19 km) in Ozaukee County. Like most Wisconsin state highways, WIS 57 is maintained by the Wisconsin Department of Transportation (WisDOT).