Marin County, CA. Sausalito maybe. Or a little farther up the coast, like Bodega Bay.
I've lived in Colorado (Denver) for the last 22 years and I'm incredibly bored. The mountains are nice, but that's ALL there is here. No sizable lakes, no rivers, and dry as a bone. You'll love the sunny weather for a while but you'll soon realize it's way too dry here. And the mountains? Booooooring. There's no variety. Every mountain, every tree, every rock look exactly the same everywhere you go. If you drive one mile, you've seen everything the Rockies has to offer. Colorado Springs is suffering from overgrowth and dirty air. Denver's air rivals L.A. for worst in the nation. Boulder is okay if you like college towns. I'm a water guy. I need ocean, big lakes, major river, etc. Colorado has none of that.
The ideal situation is to have 2 homes, not one. I suggest selling your house and buying 2 condos, one on each coast. And a P-car in each garage.