Is Vegas hilly?

Atlanta sure is hilly ... who knew? I went out for a 3ish mile walk tonight and swear I climbed the equivalent of Mt. Everest in the neighborhood next to mine. OK ... maybe I'm slightly dramatic, but I swear it was the steepest street I think I've seen in a long time. No doubt I was huffing and puffing by the time I got to the top and my legs were burning! It's a good thing Vegas is flat, because I think I might not survive if I had to run in Colorado or something! I'm such a wimp!