The Appalachian Mountains stretch through 12 U.S. states.

These states include Maine, New Hampshire, Vermont, Massachusetts, Connecticut, New York, Pennsylvania, New Jersey, Maryland, West Virginia, Virginia, and North Carolina. The range extends from the northernmost state of Maine down to Alabama in the South, showcasing a diverse array of landscapes, ecosystems, and cultural regions across its span. The Appalachian Mountains are known for their rich biodiversity, scenic beauty, and significant historical and economic contributions to the United States.