Hmm, interesting question...
The simple answer would be right where I am, AZ...
(WITHOUT the #%^&& <expletive deleted> er, "blessed" developers of course)
The complex answer...
July, August,...Alaska, Nome specifically but actually not IN Nome, and don't ask for specifics
September, October, November, ...Wyoming (I won't post the exact spot here in public)
December, January, February,...Arizona (ditto)
March, April, May...California (Imperial or Kern county)
June...California (Plumas county)
Now all I need to do is win that lottery and put this into action!

8)
What a beautiful country we live in, in my opinion no country on Earth has as much natural beauty and variety - every state I have ever visited has its own charm and grace - I cannot think of a single state that does not have great beauty and great places to go out metal detecting.
Oroblanco