Technically, NY is Mid-Atlantic, but for artificial reasons. Much of NY has much more in common with NE than it does with the other Mid-Atlantic states but as NY was a former Dutch colony, it was excluded from the compact that the early settlers drew up that defined New England. Maine and RI also were not considered to be part of early NE, however we now include them as New England states because of what they have in common with MA, CT and VT (NH was originally part of MA). I say NY - at least upstate NY - should be included in the definition of NE for the same reasons as ME and NH are.
I digress however. I want to include the Adirondack area in my preliminary search because places like Gore and Whiteface are decent ski areas (with at least 2,500 and 3,000 vertical feet, respectively) and both are well under the 8 hour ride limit I'm trying to satisfy.
Woah. You're way off. First off... New York is in no way, shape, or form part of New England. Never has been, never will be. Say something to that effect anywhere in New England, and you're apt to be asked to leave whatever establishment you're in.
Second, New Hampshire was never part of Massachusetts. Maine was part of Massachusetts until 1820, when it became its own state. So Maine has always been a part of New England, due to its being part of Massachusetts. Vermont was not originally its own colony, and would not have been considered part of New England in its own right. The territory that is now Vermont was disputed by the colonies of New Hampshire and New York, and actually became an independent republic between 1777 and 1791. Due to being its own country for a time, it wasn't really part of New England at that time. The "compact" you speak of that defines New England doesn't exist. New England is a colloquial term that defines the region, it has never had any legal definition. Since the beginning, New England has been defined as the region in the furthest northeast corner of the country, and has never included New York.
New York is the antithesis of New England. If you want to live in New England, don't ever forget it.