By IrvingPlNYC (Own work) [CC BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons
Arizona Sun Corridor
Cascadia
Front Range
Wasatch Front (could merge with the Front Range)
Northern California
Southern California
Texas Triangle
Great Lakes
Gulf Coast
Florida
Piedmont Atlantic
Northeast
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