RE: Ben Moore's - Olympia, WA
Sorry!!! I guess Ben's was closed for the holiday. But DO go back. You won't be disappointed.
One place that gave me a great one comes to mind - the Landmark Inn in Yachats, OR, earlier this spring. It was really a bacon American cheese burger, but I asked nice and got bleu cheese instead. Very good! Also serving up a darn good BBC burger - but kinda out of the way (but still meeting your "west" criterium) - is the Kiawe Grill at the Marriott Waiohai Beach Club on Kaua'i. Had another very good one at a place in San Antonio a couple months back but can't recall the name - if I can think of it I'll post it.