U.S. Route 12 (US-12) is a United States Numbered Highway in North Central Idaho. It extends 174.410 miles (280.686 km) from the Washington state line in Lewiston east to the Montana state line at Lolo Pass, generally along the route of the Lewis and Clark Expedition, and is known as the Northwest Passage Scenic Byway. It was previously known as the Lewis and Clark Highway.
Eastbound US-12 entering Idaho at Lewiston, crossing the Snake River
Lolo Pass in 2007, entering Idaho from Montana at 5,233 feet (1,595 m)
North Central Idaho is an area which spans the central part of the state of Idaho and borders Oregon, Montana, and Washington. It is the southern half of the state's Panhandle region and is rich in agriculture and natural resources. Lewis and Clark traveled through this area on their journey to the Pacific Ocean in September 1805, crossing Lolo Pass and continuing westward in canoes on the Clearwater River. They returned the following spring on their way eastward.
Lewiston and Clarkston, WA, from the north, (old grade in foreground)
Selway-Bitterroot Wilderness
Seven Devils Mountains, southwest of Riggins
Dworshak Dam and Reservoir, northwest of Orofino