Sonoran Desert - CO River Valley

Type of Content: Outside Resource
Uta stansburiana elegans
Type of Content: Image Content
Solanum hindsianum flower and fruit
Type of Content: Image Content

The Sierra San Francisco is a low-desert mountain range at the edge of the Gran Desierto of northwest Sonora. This range is owned by an ejido and protected as desert bighorn sheep...

Type of Content: Gallery
Type of Content: Video

A floristic account is provided for the cactus family as part of the vascular plant flora of the contiguous protected areas of Organ Pipe Cactus National Monument, Cabeza Prieta National Wildlife...

Type of Content: Reports, Papers, Journal Articles

Please contact regional land and wildlife managers as well as Mexican delegates for the UNESCO WHS program. Remember these officials likely agree with you, so be respectful and constructive. Thank...

Type of Content: Article
  • El Pinacate y Gran Desierto de Altar Biosphere Reserve

(Update: this race has been put on hold, likely due to permit issues with the Mexican government.)

Southern California based off-roaders are organizing a "TRUE off-road" rally race across...

Type of Content: Article
Greater roadrunner
Type of Content: Image Content

Photo log from the El Camino Del Diablo... from Tule Well in the west to Bates Well in Organ Pipe National Monument in the east. Photos taken by Mikal Jakubal in early 2013.

Type of Content: Gallery

An introduction is provided for the modern and fossil vascular plant flora of the contiguous protected areas of Organ Pipe Cactus National Monument, Cabeza Prieta National Wildlife Refuge, and the...

Type of Content: Reports, Papers, Journal Articles
Camp Grip, Cabeza Prieta National Wildlife Refuge

This base was dropped into the middle of nowhere in Cabeza Prieta at a place called Papago Well, and has heavy impact on the local flora and fauna.

Type of Content: Image Content
Larrea tridentata fruit and leaf close-up
Type of Content: Image Content

This flora of the vascular plants of the Tinajas altas region, within the Lower colorado valley subdivision of the Sonoran desert of southwestern arizona, includes the present-day species as well...

Type of Content: Reports, Papers, Journal Articles
Wildflowers and ocotillo, Harquahala Mountains
Type of Content: Image Content
Heavily overgrazed desert soil dust pit
Type of Content: Image Content

This was a long weekend trip to the west side of the Pinacate Biosphere Reserve. We encountered no other humans. The trip went to Sykes Crater, MacDougal Crater, and Tinaja de los Papagos, among...

Type of Content: Gallery
Callisaurus draconoides, zebra-tailed lizard
Type of Content: Image Content

A carring individual's personal narrative and photos about changes to the Cabeza Prieta Wildlife Refuge and the El Camino del Diablo in southwestern Arizona. These changes happened primarily...

Type of Content: Article

An Endangered Species within Organ Pipe Cactus National Monument: Historical Significance and Management Challenges

The largest body of water at Organ Pipe Cactus National Monument is...

Type of Content: Reports, Papers, Journal Articles
  • Rio Sonoyta map

The Rio Sonoyta, despite grazing across the watershed, agriculture, groundwater pumping, and the incredible dry nature of the region, still has perennial flow in stretches west of the town of...

Type of Content: Basic page
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