2018 Map of South of Lukeville

About this map

The international boundary between the United States of America and Estados Unidos Mexicanos cuts across the northern edge of this landscape, marking a stark political division in the Sonoran Desert. Much of the northern terrain shown is preserved within the Organ Pipe Cactus National Monument, where the natural drainage patterns of numerous ephemeral desert washes flow southward across the border into Mexico. Near the northeastern corner of the sheet, the settlement of Dos Lomitas sits just inside the United States, representing one of the few named landmarks in this arid borderland. The map reveals the characteristic alluvial fans and wash networks that define the hydrology of this region, providing a technical view of the desert floor before it extends further south into Sonora.