This is a pretty cool idea, but I feel obligated to nitpick your borders in the PNW. It seems you arbitrarily cut through the middle of Washington.
The Cascade mountains are universally accepted as the "border" between Western and Eastern Washington. I know that for a lot of states the borders between regions may be ambiguous, but this isn't the case in Washington. Everybody agrees the Cascades are the borders.
see:
http://en.wikipedia.org/wiki/File:Westernwashington.PNGAll of the counties in white should be in Big Sky, while the red should remain as Washington.
