They are working on Northern California and Central Rocky Mountains, with Southern Rocky Mountains to be released next year. You can save 15% on CRM by prepaying now.
I'm hoping they will fill in the gap between NCA and SRM, as that should be awesome. Nor would I object to going from the north end of SRM to the Canadian border.
If God intended aircraft engines to have horizontally opposed engines, Pratt and Whitney would have made them that way.