Where does the Appalachian mountains start in new jerseynew york Pennsylvania and where it end?

The Appalachian Mountains don't actually "start" in New Jersey, New York, or Pennsylvania. They are a much larger mountain range that stretches for over 1,500 miles from the Canadian province of Newfoundland all the way down to Alabama in the US.

Here's how the Appalachian Mountains relate to those states:

* New Jersey: The northernmost extent of the Appalachian Mountains in New Jersey is the Kittatinny Ridge, which forms the northern border of the state. It's a part of the Appalachian Plateau region, which is a plateau area with rolling hills and some low mountain ranges.

* New York: The Catskill Mountains in New York are part of the Appalachian Plateau. They are not considered part of the main Appalachian mountain chain, but they are still geographically connected.

* Pennsylvania: Pennsylvania is home to a significant portion of the Appalachian Mountains, including the Allegheny Mountains. The state's landscape is heavily influenced by the range, which includes the famous Laurel Highlands and the Pocono Mountains.

Therefore, the Appalachian Mountains don't technically "start" in these states, but they are a significant presence in the eastern landscapes of these regions.