1930 Map of Aguila Mountains

About this map

San Cristobal Valley dominates the lower Sonoran desert landscape in this late 1920s survey, representing a vast expanse of alluvial plains and desert drainage systems. The Aguila Mountains rise sharply as a central topographic anchor, their jagged contours providing a stark contrast to the surrounding flats. Early transportation across this arid terrain is evidenced by Yager Road, which strikes a linear path through the valley, serving as a primary corridor for travel in a region otherwise defined by its natural barriers. To the north, the Aztec Hills mark the transition into higher desert ground. This map, surveyed by Bishop Moorhead and C.N. Mortenson under the direction of Governor Geo.W.P. Hunt, captures the raw, undeveloped character of Yuma County before modern irrigation and infrastructure fundamentally altered the Arizona desert.