El Pinacate and Gran Desierto de Altar Biosphere Reserve is a biosphere reserve and UNESCO World Heritage Site managed by the federal government of Mexico, specifically by Secretariat of the Environme
Aerial view of El Pinacate y Gran Desierto de Altar Biosphere Reserve and adjacent volcano with black lava flows
Pinacate volcanics with teddy-bear chollas, ocotillos, young saguaros, and a palo verde tree. Photo by Jack Dykinga.
Crater Elegante
Tohono O'odham woman. Photo by Edward S. Curtis, circa 1907.
Tinajas Altas Mountains
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The Tinajas Altas Mountains are an extremely arid northwest–southeast trending mountain range in southern Yuma County, Arizona, approximately 35 mi southeast of Yuma, Arizona. The southern end of the
Sign along El Camino Del Diablo in Barry M. Goldwater Air Force Range, near Wellton, Arizona, at spur road to Tinajas Altas.