Northwest Passage Scenic Byway is Idaho’s longest byway, which at 202 miles, follows the route Lewis and Clark took through north-central Idaho. This beautiful route begins on US 12 at Lewiston, and traverses the winding Clearwater RiverCanyon. At Kooskia the byway splits with one segment heading south on Idaho Highway 13 toward the Camas Prairie and the town of Grangeville. Another segment continues east on US 12 along the Middle Fork of the Clearwater River, and the Lochsa Wild and Scenic River, through a magnificent wilderness culminating at the Lolo Pass Visitor Center.

Things To Know

  • Location: Begins in Lewiston and follows US 12 northeast to the Idaho–Montana border; also follows Idaho 13 from Kooskia to Grangeville and the junction of US 95.
  • Boating, fishing, heritage, and wildlife viewing is available year-round. Whitewater opportunities run in the spring and summer.
  • Attractions include the Tsceminicum sculpture, Nez Perce National Historical Park Visitor Center, and Hells Gate State Park.
  • Drive Time:  Lewiston to Montana, 175 miles, allow 4 hours. Kooskia to Grangeville, 27 miles, allow 40 minutes.
  • Plan ahead to ensure a safe and enjoyable trip (fill up on gas, pack water and food, etc.).
  • Winter driving conditions may include black ice in the canyons and snow-covered roads at higher elevations.