We drove 50 miles north from Sandpoint Idaho to the Canadian border but couldn't enter because you need a photo ID and your birth certificate. We don't carry our birth certificates around with us, so we just looked over the border. In the photo above you can see a small vertical line up the mountain that my husband tells me is the border line.
It was funny to see a sign saying welcome to the USA when we hadn't left but it was for the cars entering from Canada. The gas station sold gas for $1.07 per liter which is about $4.09/gallon. Gas has been really reasonable here in Idaho $3.94/gallon which is cheaper than Utah.