The roads running through San Francisco are famous (or infamous) for how steep they are. You better believe San Francisco is hilly!
The proper adjective is San Franciscan.
Flat
flat
Parts of Australia's deserts are flat and others are hilly.
The opposite of hilly is flat or level.
flat in the north (near the sea) to mountained in the south (part of the Alps)
San Francisco does not have mountains within the city limits. However, the city is surrounded by hilly terrain, with prominent peaks such as Twin Peaks and Mount Davidson providing scenic views of the area.
is golden sands hilly or flat
Extremely flat
relatively flat
Greece is mostly hills and mountains.
north Germany is flat and south is mountains