U.S. Route 12 in Idaho

This article is about the section of U.S. Route 12 in Idaho. For the entire route, see U.S. Route 12.

U.S. Highway 12 marker
U.S. Highway 12
Lewis and Clark Highway
Northwest Passage Scenic Byway
Map
US 12 highlighted in red
Route information
Maintained by ITD
Length174.410 mi[1] (280.686 km)
Existed1962–present
Tourist
routes		 Northwest Passage Scenic Byway
Major junctions
West end US 12 at Washington state line in Lewiston
Major intersections US 95 in Lewiston
East end US 12 at Montana state line at Lolo Pass
Location
CountryUnited States
StateIdaho
CountiesNez Perce, Clearwater, Lewis, Idaho
Highway system
  • Idaho State Highway System
← SH-11→ SH-13

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,[1] generally along the route of the Lewis and Clark Expedition, and is known as the Northwest Passage Scenic Byway.[2] It was previously known as the Lewis and Clark Highway.

  1. ^ a b Idaho Transportation Department. "Milepost Log, US 12" (PDF). Archived (PDF) from the original on February 4, 2017. Retrieved June 3, 2017.
  2. ^ "Northwest Passage Scenic Byway". Idaho's Scenic Byways. Archived from the original on June 25, 2013.