Continental Divide of the Americas
Great Divide
Centennial State
Colorado
CO
Colo.
Equality State
WY
Wyo.
Wyoming
Gem State
Idaho
ID
Id.
Rockies
alpine milk vetch
Astragalus alpinus
Rocky Mountains
Chlorura chlorura
green-tailed towhee
montology
western blind snake
Leptotyphlops humilis
Thomomys bottae
valley pocket gopher
Crotalus horridus horridus
side
timber rattlesnake
slope
incline
banded rattlesnake
fringe-toed lizard
Uma notata
volcano
Green Mountains
Arizona
Texas storksbill
AZ
Grand Canyon State
Erodium texanum
Cascade Range
cordillera
Cascade Mountains
bajada
Cascades
horseback
northwestern United States
rosy boa
Lichanura trivirgata
Northwest
desert pavement
rockland
Trimorphodon lambda
Dakota Formation
ravinement
Sonoran lyre snake
tor
Neb.
Cornhusker State
Crotalus lepidus
crestline
Nebraska
rock rattlesnake
cap
shoulder
NE
cuscutin
Appalachians
Baja California
Appalachian Mountains
Lower California
palaeolatitude
Llano Estacado
Baja California Peninsula