2011 Map of Mildred Peak

About this map

Mildred Peak and Osobavi Peak dominate this corner of the Sonoran desert, overlooking a landscape defined by an intricate network of desert washes and isolated ranching outposts. The drainage patterns of Shaffer Wash, Thomas Canyon Wash, and Las Moras Wash trace the natural movement of water through the arid terrain toward the south. Cattle ranching history is evidenced by the presence of Santa Margarita Ranch, Las Moras Ranch, and Shaffer Camp, along with numerous water management features like Cemetery Tank, Milpa Tank, and the Clemente Windmill. This 2011 survey captures the area’s reliance on these widely dispersed water sources, from Corodope Spring to specialized catchment basins like Jackknife Tank and Seven X Tank, reflecting the long-standing livestock operations that persist in this part of Pima County.