1971 Map of Big Maria Mts SW

About this map

The Big Maria Mountains dominate this arid Riverside County landscape, characterized by steep desert slopes and a network of mining exploration sites. In the early 1970s, the terrain was primarily used for mineral extraction and transit, evidenced by numerous prospects, scattered Mines, and a Gravel Pit located along the flats. The southeastern portion of the map shows the transition from the rugged highlands down toward the Colorado River valley, though the map remains focused on the high-elevation peaks and the Black Hill landmark.