Boise Idaho. Tons of folks on SS/FG here, myself included. Probably moreso because sw8t fixxays are hip and all that, but our terrain is still super flat. Unless you venture into the foothills for some real riding, the only hills in town are a few "benches." 50-100 ft max elevation gain. The rest of the city is a pancake. The only elevation on my 11 mile commute is the interstate overpass...
OTOH, we have some amazing climbing here too. The road to Bogus Basin ski resort is 3400 ft over 172 turns. I can do it in 1:10 race pace. The pros do it in 50mins. The ride down those 172 turns is even funner!