Appalachian Mountains: Northeastern U.S. States

The Appalachian Mountains traverse the following northeastern states (north to south):

1. Maine
2. New Hampshire
3. Vermont
4. Massachusetts
5. Connecticut
6. Rhode Island (small western corner)
7. New York (Adirondacks are geologically distinct; the Appalachian proper includes the Taconic, Catskill, and Hudson Highlands regions)
8. Pennsylvania
9. New Jersey (Kittatinny Mountain / Ridge-and-Valley)

The range continues southwest through Maryland, West Virginia, Virginia, Kentucky, Tennessee, North Carolina, Georgia, and Alabama. The northeastern section features the White Mountains (NH), Green Mountains (VT), Berkshires (MA), and the Hudson Highlands (NY/NJ).