Monument Valley
Grand Canyon
Grand Canyon National Park
bajada
Centennial State
CO
Colorado
Colo.
canyonland
Four Corners
Sonoran Desert
Colorado River
Black Mountains
Painted Desert
Arches National Park
South Park
Arizona
AZ
San Juan Mountains
Grand Canyon State
Canyonlands National Park
Casper
plateau striped whiptail
rimrock
Teton Range
Cnemidophorus velox
Yuma
Black Rock Desert
Wyoming
Equality State
WY
Plains
Bighorn Mountains
Wyo.
Sierra Nevada
Virgin
Mojave Desert
Mojave
Mohave Desert
Mohave
downcanyon
Gila Desert
ridgeline
couloir
hardveld
canyonside
Virgin Valley
Sierra Madre Occidental
Canyonlands
Neb.
Idaho
Cornhusker State
divide
Colorado Plateau
Id.
ID
Nebraska
Gem State
NE
Chihuahuan Desert
Crotalus tigris
upcanyon
Lost River Range
Lake Powell
tiger rattlesnake
shebka
clough
Big Sur
dyke
Mesa Verde National Park
Chlorura chlorura
southwestern United States
park
Southwest
Alta California
green-tailed towhee
Llano Estacado
Tapeats
rift valley
Capitol Reef National Park
Chavez Ravine
Yosemite toad
Dead Negro Draw
Cascade Range
Seven Devils
Cascade Mountains
glyn
Bufo canorus
Cascades
height
mesa
Longs Peak
canyoned
sitch
gendarme
barranca