SSH 5K was added to the state highway system in 1937. This route began at Jct PSH 5 (now SR 7) in Morton and headed westerly via Onalaska, ending at Jct PSH 1 (US 99). When the US 99 expressway that later was upgraded to I-5 freeway opened in Southern Lewis County in the mid 1950s, SSH 5K was extended west from old 99 to new 99. Today, SSH 5K is SR 508.
Interstate Routes
US Routes
State Routes
Primary State Hwys
Secondary State Hwys
Home Page
