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1955 Map of Big Maria Mts SE

Name: 1955 Topographic Map of Big Maria Mts SE
Creator: U.S. Geological Survey
Published: 1971
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1971

About this map

The Colorado River serves as the primary artery through this desert landscape, defining the state line between California and Arizona during a period of mid-century riverfront development. Along the California bank, a string of recreational and agricultural outposts such as Haakers Camp, Thompsons Camp, and the Blythe Boat Club reflect the era's growing focus on river access. On the opposite bank, the Colorado River Indian Reservation spans the Arizona side, containing significant cultural sites including the Giant Indian Intaglios.

The western portion of the map is dominated by the Big Maria Mountains, where a Jeep Trail and several labeled prospects indicate mineral exploration. Near the river's bend, Hall Island and Horse Island sit within the shifting channels, while the River Bend Lodge and Hills Ranch provide evidence of early riverside settlement. This 1970 photorevised edition captures the specific boundary adjustments and land use patterns established by the State of California Colorado River Boundary Commission and its Arizona counterpart.