one who does not usually drive on mountain roads

A term used in the mountains to describe people from lower elevations.

the term flatlander isn't specific to any state. It's a term that all mountain people use to describe tourist that don't have the skills/knowledge to recreate in the mountains

Used by native Vermonters to describe people from anywhere else in the country, regardless of whether or not your state has a higher elevation than Vermont. If you aren't native to Vermont, you're a flatlander, period. The term came about because of people from other states visiting the state on account of the ski resorts and the mountains.

Negative term used by countryfolk or other small-town citizens to describe non-native visitors that bring unwanted qualities of their hometown with them. It is often difficult for flatlanders to rid themselves of this label, even if they assimilate into the local culture.

This term can also be applied to a sudden and noticeable influx of non-native peoples into a larger town, state, or territory. These situations are often the result of a town/state/territory possessing natural beauty or resources.

A term given by Vermonters to rich, out of staters (such as people from Connecticut, New York, New Jersey, and Massachusetts) as they come up to Vermont in their big, gas guzziling SUVs to ski at the many ski resorts in Vermont. As much as the Vermonters hate flatlanders, flatlanders support their economy by visiting their country stores, gas stations, and hotels.
You know your a flatlander if:
-You drive an escalade, suburban, tahoe, yukon denali ect.

-You're annoyed at the fact that your iPhone or other expensive smartphone doesn't get 3G in Vermont.
-You own a season pass to one of the big ski resorts.
-You own a condo or house in Vermont
-You think that Vermont is a poor state when you drive along the back roads.

where i'm from, a flatlander is the worst thing to be. its kind of like in california where the locals hate the tourists that come to surf, well in northern PA we hate people from jersey, pittsburgh, and philadelphia that come up to hunt deer. a flatlander usually, though not always, has zero respect for the land, the animals they're trying to hunt, and the locals that put up with them. some of them are nice guys that have a true love for hunting, but the majority of them come up to get drunk at the hunting camp, get into fights at the bar, and for the most part make people from northern PA wary of anything that has a funny accent.