Length: 137.9 mi. Direction: south-north. Wisconsin Highway 42 (WIS 42 or State Trunk Highway 42) is a highway in the state of Wisconsin that begins near Sheboygan, and ends in Northport. The road passes through the counties of Sheboygan, Manitowoc, Kewaunee, and Door. An important part of the route belongs to the Lake Michigan Circle Tour.
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