1979 Map of Penitas Hills

About this map

Peyron Ranch and San Juan Ranch stand as primary markers of human settlement in this arid reach of the Sonoran desert during the late 1970s. The landscape is defined by the drainage patterns of Tascuela Wash, San Juan Wash, and Papago Wash, which carve through the Black Hills and the southern extent of the Sierrita Mountains. Cattle ranching and water management are evident through the network of named tanks, including La Cholla Tank and Soldado Tank, which supported the local economy alongside the Batamote Road. High points like Baldy Peak and Cerro Prieto rise above the alluvial fans, while extractive industries are noted by several Quarries and Prospects in the northeastern foothills. A Section Well and the Cinco de Mayo Well suggest the vital importance of groundwater in this territory, where even minor features like Ash Dam were critical to local land use.