1979 Map of Presumido Peak

About this map

The Baboquivari Mountains and Pozo Verde Mountains define this high-desert landscape along the international border in southern Arizona. At the edge of the Papago Indian Reservation, the map captures a network of working ranches and seasonal water management features essential for cattle operations in a dry climate. Notable cattle-era landmarks include Buenos Aires Ranch and Sierra Vista Ranch, alongside smaller outposts like Los Encinos Ranch. The importance of water security is visible in the numerous earthen works and natural catchments such as Osa Dam, Mormon Lake, and Aguirre Lake. These features, along with names like Presumido Pass and Compartidero Flats, reflect a long history of transborder movement and land use near the small settlement of Sasabe.