There are state fairs in most American states, I suppose ... but the situation in Montana is a little more complicated: we have two annual events vying for statewide attention. Great Falls has the Montana State Fair, and Billings has something called MontanaFair, which claims to be larger. My vote definitely goes to the event up in Great Falls, partly because I like the city more, and partly because Great Falls has a handsome and classic fairgrounds. The venue in Billings is a nondescript trade-show space, with a thoroughly-ugly arena named for a car dealership.
It wasn't always that way, though ... here's a postcard photo of the Billings fairgrounds back in the 1930s. If only the place still looked like this!