I know that sounds like a commercial, but it’s only background for a little Idaho history trivia.
Up until 1972 the building where the Blackfoot store resides sat alongside railroad tracks in Mackay. In fact, it was the Mackay Depot, built by Union Pacific in about 1901. The Mackay Branch line was discontinued in 1961.
It’s not unusual for an old railroad depot to find another purpose, but the move from Mackay to Blackfoot (Rockford, to be exact) must have been one of the longer ones for traveling depots, a distance of about 80 miles.