
The borderlands of New Mexico and Arizona meet at the small settlement of Rodeo, a focal point of this 1980s-era survey. Situated on the Arizona New Mexico state line where Cochise and Hidalgo counties join, the landscape is defined by the ephemeral drainage of the San Simon River and the stark elevation change leading into the Coronado National Forest. This region preserves the Old Railroad Grade, tracing a path parallel to the modern highway and Portal Road, marking the historical transportation corridor through this high desert valley.
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This is the sole edition of this map. No revisions or reprints were ever made.
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