We drove this "US Highway" in August from Keystone to Hermosa, SD. I quote "US Highway" because it's not what you think. If you try to pull your travel trailer or 5th wheel on it, you're going to be doing some serious backing. It was the windingest road I've ever driven and there were a ton of motorcycles. If you get a chance to drive the route, it's pretty awesome.
Last edited: