So far the three places I've lived and biked in have been great. Biking in northern California was great. Cumberland Valley (PA, MD, WV, VA) around the Appalachians. Phoenix is probably the worst. Only due to the weather. But there is an abundance of trails. But it's pretty much the same temperature as the surface of the sun in summer. But you can always travel up to Sedona, or Flagstaff and bike there.