State Trunk Highway 137 (often called Highway 137, STH 137 or WIS 137) is a state highway in the U.S. state of Wisconsin. It runs from its western terminus at U.S. Route 2 outside of Ashland to its eastern terminus at Wisconsin Highway 13 in Ashland. Like all Wisconsin state highways, WIS 137 is maintained by the Wisconsin Department of Transportation (WisDOT).