Slim:
It's DEFINITELY in Utah. Knowing the place you're talking about -I can remember it once was a hamburger specialty place, then a Mexican joint, and God knows what else. Anyway, I decided to check it out on Google maps. When I zoomed in - wonder of wonders - it's one of the only things on the Utah side that comes up with its own marker, clearly saying "Salt Flats Cafe"!
Jeff in Boise