Shortly after entering Idaho from the west, US 2 crosses the Priest River.
The western segment of US 2 has its western terminus at an interchange with Interstate 5 (I-5) and State Route 529 (Maple Street) in Everett, Washington, and its eastern terminus at I-75 in St. The eastern segment of US 2 has its western terminus at US 11 in Rouses Point, New York and its eastern terminus at I-95 in Houlton, Maine. Most of the western route was built roughly paralleling the Great Northern Railway.It re-enters Michigan north of Iron Mountain and continues through the Upper Peninsula of Michigan to the cities of Escanaba, Manistique, and St. Along the way, it cuts through the Ottawa and Hiawatha National Forests and follows the northern shore of Lake Michigan.It ends at I-75, just north of the Mackinac Bridge in St. on the Rouses Point Bridge into Grand Isle County, Vermont, traversing the length of the county and crossing the lake over several bridges until it reaches the mainland in Milton and Chittenden County.It travels through Shelby where it meets Interstate 15, before it goes on to Havre.The highway continues east and leaves the state near the confluence of the Missouri and Yellowstone Rivers.The two routes are duplexed for 36.2 miles (58.3 km).