Idaho State Highway 66


State Highway 66 is a state highway located entirely within Latah County in North Central Idaho. SH-66 runs from the Washington state line in unincorporated Latah County east 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 northwest of Viola; the route continues northwest into Washington as Palouse Cove Road. From here, the highway heads southeast through a rural area. After passing Potter Road, the route turns to the west. Shortly after passing Weber Road, SH-66 terminates at a 3-way junction with US-95 north of Viola. The route is a two-lane undivided road for its entire length.

Major intersections