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1938 Map of Galiuro Mts

Name: 1938 Topographic Map of Galiuro Mts
Creator: U.S. Geological Survey
Published: 1968
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1968

About this map

Coronado National Forest dominates this 1938 landscape, where high peaks and deep canyons define the borderlands of Graham, Pinal, and Pima counties. The map details a rugged mining and ranching economy, with isolated operations like the Bunker Hill Mine and Magna Mine situated near the northwestern edge of the range. Higher elevations and interior drainages reveal a network of pack trails and remote outposts, including Geronimo Camp and Powers Garden Spring, suggesting a period when mineral extraction and high-country grazing were the primary drivers of human activity.

Water sources are vital markers on this terrain, ranging from the San Pedro River in the valley to high-altitude landmarks like Upper Ash Spr. Named peaks such as Bassett Peak and Rhodes Peak tower over a complex system of drainages, including Rattlesnake Canyon and Redfield Canyon. The presence of several family-named homesteads, such as Simms Ranch and Rhodes Ranch, provides a record of the early twentieth-century ranching legacy within the Galiuro range.