Colorado river: Byers Canyon, Glenwood Canyon (CO), Moab (Hwy 128 Scenic Byway), Grand Canyon, Marble Canyon, Pariah Beach, Arizona Hot Springs, White Rock Canyon (AZ)
Colorado affluents: Gunnison (Curecanti Nat. Rec. Area), Animas (Silverton to Durango), San Juan (Gooseneck SP, UT), Little Colorado (AZ), Salt Trail (AZ), Havasu (AZ), Virgin (AZ)
Others in Colorado: Big Thompson, Little Thompson (Estes Park), South St. Vrain Creek, Hardscrabble Creek,
Canyon drives:
CO: Colorao river & affluents (above)
WY: Wind River (US20), Shell (US 14), Bighorn (WY37, Devil's Canyon Overlook), Yellowstone narrows (Grand Loop Rd)
ID: Snake River (Twin Falls, US93, ID50)
AZ: Virgin River (I15), Salt river (US60), Oak Creek (AZ89A)
NV: Lamoille Canyon Scenic Byway, Valley of Fire Hwy
AK: Keystone
Similar gorges
Canadian Rockies: Johnston Canyon (Banff NP), Maligne Canyon - (Jasper NP), Mistya Canyon (Jasper NP), Athabasca Falls (Jasper NP), Sunwapta Falls (Jasper NP)
Washington: Quinault river (Enchanted Valley trail), Olympic NP
Minnesota: Baptism River, Temperance River
Maine: Screw Auger Falls (Grafton Notch SP)
New Hampshire: Flume Gorge (Franconia Notch State Park), Rocky Gorge
Oregon: Smith Rock SP
Idaho: Jump Creek (Marsing, ID)
Wyoming: Firehole Canyon (Yellowstone NP)
Colorado: Cascade Creek (Durango), Box Canyon (Ouray),
California: Fern Canyon (Prairie Creek Redwoods SP), Santa Paula Punchbowls (Los Padres NF), Stony Creek (Sequoia NP)