Idaho | Interstate Highways | U.S. Routes | State Highways 1-50 | State Highways 51-200 | This starts in the northwest corner of the state and moves clockwise around it.  British Columbia International Boundary:   (Porthill, ID) Last reassurance shield in Idaho, 1000 feet to the border, stop at customs, the border! ——————————————————————————————  (Eastport, ID) Canada makes its first … Continue reading State Line Crossings