Huh? The city itself is really flat - I've been through it, and a quick image search confirms as much. There are mountains nearby, but saying "there is absolutely nothing 'flat'" about it is pretty disingenuous.
I mean, sure, there are flat parts - as with all cities. But if we are ranking cities by flatness, SLC would be somewhere in the bottom 10 percent. "Flat" is just a horrible descriptor for that city.