2021 Map of Granite Mountains North

About this map

Granite Mountains dominate the central spine of this landscape, creating a high-relief boundary between two distinct desert basins. To the east, the Growler Valley spreads toward the Growler Wash, while the western slopes descend toward the San Cristobal Valley. This section of the Sonoran Desert is further defined by the jurisdictional line between Yuma Co and Pima Co, which runs north-south through the western foothills. The map reveals the stark topography of the region, where drainage patterns from the peaks feed into the surrounding valleys, illustrating the isolation and natural water-shedding characteristics of this arid terrain. It is a portrait of a wilderness largely untouched by development, focusing on the geological and political boundaries that define the Arizona-Sonora borderlands.