
Sierrita Mountains anchor the northern landscape of this arid Pima County region, where the terrain is defined by a dense network of seasonal drainage channels and scattered water tanks. The presence of numerous livestock-related landmarks such as Adobe House Tank, Cowboy Tank, and Homestead Tank reflects the long-standing ranching heritage of the area. Movement across the desert floor is facilitated by historical routes like San Juan Ranch Rd and Batamote Rd, which connect the lowlands to the more prominent Batamote Hills and Tinaja Hills in the south and east. A complex system of washes, including Champurrado Wash and Escondido Wash, dictates the flow of water during infrequent rains, creating a rugged topography marked by isolated summits like Lobo Peak and Red Boy Peak. This detailed record of the desert's physical and cultural geography provides a baseline for understanding land use and water management in the Arizona backcountry.
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1920 · Arivaca
USGS Topo · 1:125,000
1925 · Samaniego Peak
USGS Topo · 1:62,500
1939 · Twin Buttes
USGS Topo · 1:62,500
1939 · Tubac
USGS Topo · 1:62,500
1940 · Palo Alto Ranch
USGS Topo · 1:62,500
1941 · Twin Buttes
USGS Topo · 1:62,500
1941 · Arivaca
USGS Topo · 1:62,500
1943 · Arivaca
USGS Topo · 1:62,500
1943 · Palo Alto Ranch
USGS Topo · 1:62,500
1943 · Tubac
USGS Topo · 1:62,500