1939 Map of Red Hill

About this map

Annie Mine and the Los Angeles site anchor the desert activity in this 1930s survey of the Arizona wilderness. The landscape is defined by the massive drainage systems of Yuma Wash and Indian Wash, which cut through the arid terrain between the Trigo Mountains and the Middle Mountains. This era of documentation highlights the reliance on specialized routes such as the Mine Road and the established path toward Quartzsite. High points like Trip Mtn and Red Hill provide prominent landmarks overlooking the Castle Dome Plains, capturing the remote industrial and geological character of Yuma County before later development altered the region's accessibility.