USAs stater med flest dal: Bjergede regioner fra Colorado til New Hampshire

Dale dannes, hvor tektonik, erosion og glaciation udhugger lavlande mellem højlande. Stater med omfattende bjergkæder har flest dale:

1. Colorado — Rockies: Cache la Poudre, San Luis, Yampa, Roaring Fork-dale.
2. California — Sierra Nevada, Kystkæder: Yosemite, Napa, Sonoma, Central, Imperial, Death Valley.
3. Washington — Cascades, Olympics: Methow, Skagit, Yakima, Hoh-dale.
4. Oregon — Cascades, Siskiyous: Willamette, Rogue, Umpqua, Grande Ronde-dale.
5. Idaho — Rockies, Sawtooths: Sawtooth, Salmon River, Wood River, Treasure Valley.
6. West Virginia — Appalachians: New River Gorge, Shenandoah (strækker til VA), Greenbrier, Potomac-dale.
7. Pennsylvania — Appalachians: Wyoming, Lehigh, Cumberland, Susquehanna-dale.
8. New York — Adirondacks, Catskills: Hudson, Mohawk, Finger Lakes (glaciale dale), Schoharie-dale.
9. Vermont — Grønne Bjerge: Champlain, Mad River, Winooski, Connecticut River-dale.
10. New Hampshire — Hvide Bjerge: Pemigewasset, Conway, Connecticut River, Lost River-dale.

Andre dalrige stater: Montana, Wyoming, Utah, Arizona, Nevada, North Carolina, Tennessee, Kentucky, Virginia, Maryland.