The Sonoran Desert includes much of southern Arizona and extends into northwestern Mexico. The archetypal desert landscape of the imagination, the Sonoran Desert is characterized by the iconic saguaro cactus as well as cholla, prickly pear, and organ pipe cacti. The region experienced much volcanic activity between 20-40 million years ago, leaving behind striking landscapes of jagged volcanic pinnacles and ranges.

Arizona, Kofa National Wildlife Refuge, cholla, Kofa Mountains
Kofa Mountains, Arizona
Arizona, Kofa National Wildlife Refuge, Signal Peak, Squaw Peak, Kofa Mountains
Kofa Mountains, Arizona
Arizona, Saguaro National Park
Saguaro National Park, Arizona
Arizona, Kofa National Wildlife Refuge, cholla, Kofa Mountains
Kofa Mountains, Arizona
Arizona, Saguaro National Park
Saguaro National Park, Arizona
Arizona, Superstition Mountains, Superstition Wilderness, tent
Superstition Mountains, Arizona
Arizona, Superstition Mountains, Superstition Wilderness, Weavers Needle, tent
Superstition Mountains, Arizona
Arizona, Kofa National Wildlife Refuge, Signal Peak
Kofa Mountains, Arizona
Arizona, Kofa National Wildlife Refuge, Signal Peak, Squaw Peak, Kofa Mountains
Kofa Mountains, Arizona
Arizona, Kofa Mountains, Kofa National Wildlife Refuge, Signal Peak, pricky pear
Kofa Mountains, Arizona
Arizona, Saguaro National Park
Saguaro National Park, Arizona
Arizona, Saguaro National Park, petroglyphs, Hohokam, Signal Hill
Saguaro National Park, Arizona
Arizona, Kofa National Wildlife Refuge, Signal Peak, Spiral Labyrinth, Kofa Mountains
Kofa Mountains, Arizona
Arizona, Kofa National Wildlife Refuge, ocotillo, Kofa Mountains, stars
Kofa Mountains, Arizona
Arizona, Kofa National Wildlife Refuge, Signal Peak, wildfire, Kofa Mountains
Kofa Mountains, Arizona