Major Water Bodies in the Appalachian Mountains Region

The Appalachians are a hydrological nexus, feeding or bordering numerous major water bodies:

Oceans & Seas

• Atlantic Ocean (entire eastern flank)
• Gulf of Mexico (southern terminus via Mobile, Apalachicola basins)

Major Estuaries & Bays

• Chesapeake Bay (largest US estuary)
• Delaware Bay
• Raritan Bay
• New York Harbor
• Long Island Sound

Major Rivers (Appalachian Headwaters or Mainstems)

• St. Lawrence River (via Lake Champlain/Richelieu)
• Great Lakes (southern shore tributaries)
• Ohio River (Allegheny, Monongahela, Kanawha, Kentucky, Cumberland, Tennessee)
• Tennessee River (entirely Appalachian headwaters)
• Cumberland River
• New River (oldest in N. America?)
• Gauley River
• James River
• Potomac River
• Susquehanna River (longest on East Coast)
• Delaware River
• Hudson River

These waters support biodiversity, drinking water for millions, hydropower, navigation, and recreation—linking the mountains to the coast.