The international border between the United States of America and Estados Unidos Mexicanos cuts diagonally across this desert landscape, marking a stark political division through the Sonoran wilderness. To the north, the protected lands of Organ Pipe Cactus Natl Monument encompass the southern reaches of the Puerto Blanco Mountains and the expansive La Abra Plain. This region is defined by its arid drainage patterns, most notably the seasonal Aguajita Wash which threads through the northwest. While largely undeveloped, the presence of Puerto Blanco Dr provides a singular corridor through the terrain, highlighting the remote nature of this borderland area as it appeared in the early 21st century.
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This is the sole edition of this map. No revisions or reprints were ever made.
1953 · Ajo
USGS Topo · 1:250,000
1954 · Sonoyta
USGS Topo · 1:250,000
1957 · Ajo
USGS Topo · 1:250,000
1958 · Ajo
USGS Topo · 1:250,000
1962 · Ajo
USGS Topo · 1:250,000
1963 · Ajo
USGS Topo · 1:250,000
1963 · Lukeville
USGS Topo · 1:62,500
1963 · Quitobaquito Springs
USGS Topo · 1:62,500
1963 · Kino Peak
USGS Topo · 1:62,500
1963 · Lukeville
USGS Topo · 1:250,000