Anyone who doesn’t think the Smoky, Blue Ridge, or Appalachian mountains aren’t real mountains is silly. The highest I believe is over 6600’ with several others over 6000’.There's always New Hampshire, though it's too close to MA. I'm of the same frame of mind, and have been considering southern MO, WV, eastern KY, and TN. Some of it depends on your definition of "mountains" . Good luck finding a place.