1941 Map of Presumido Peak

About this map

The Baboquivari Mountains dominate this 1941 landscape, a rugged borderland where the high peaks of Aguirre Peak and Presumido Peak overlook a network of washes and high-desert ranching outposts. Along the southern boundary, the United States Mexico border is anchored by the settlement of Sasabe, where a U S Customs station stands near the Rancho de la Osa. The map records a transition between the Baboquivari Indian Reservation to the west and the expansive valley flats to the east, marked by isolated features like the Site of Old Indian Fort near Nachi Kulik. Cattle ranching was the primary engine of this remote economy, evidenced by the numerous named properties such as Santa Margarita Ranch, Buenos Aires Ranch, and the Presumido Store. Water remains a central theme in this arid environment, traced through intermittent flows like Hondo Wash and the presence of rare catchments such as Aguirre Lake and Mormon Lake.