Idaho State Highway 66

State Highway 66 is a state highway located entirely within Latah County, Idaho, United States. It travels for less than from Palouse Cove Road at the Washington state line to U.S. Route 95 north of Viola. The highway is maintained by the Idaho Transportation Department.

Route description

SH-66 begins at the Washington state line as a continuation of Palouse Cove Road, which connects to the city of Palouse. From the state line, the highway travels southeast through a rural area and turns east to reach its terminus at US-95 north of Viola. The route is a two-lane undivided road for its entire length.