The southern reaches of the Chocolate Mountains dominate the northwestern corner of this desert landscape, where steep topography transitions into broad alluvial plains cut by seasonal drainage networks. These dry watercourses, most notably McAllister Wash and Indian Wash, weave southward through the arid terrain, illustrating the natural hydrological patterns of this border region. In the southwest, the community of Martinez Lake represents a primary point of human settlement, situated where the arid environment meets the influence of regional water systems.
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This is the sole edition of this map. No revisions or reprints were ever made.
1903 · Yuma
USGS Topo · 1:125,000
1905 · Yuma
USGS Topo · 1:125,000
1929 · Laguna
USGS Topo · 1:62,500
1939 · Red Hill
USGS Topo · 1:62,500
1942 · Yuma
USGS Topo · 1:250,000
1942 · Blythe
USGS Topo · 1:250,000
1943 · Laguna
USGS Topo · 1:62,500
1945 · Picacho Peak
USGS Topo · 1:62,500
1945 · Picacho
USGS Topo · 1:62,500
1951 · Picacho
USGS Topo · 1:62,500