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1957 Map of Gilmore

Name: 1957 Topographic Map of Gilmore
Creator: U.S. Geological Survey
Published: 1965
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1965

About this map

Gilmore sits at the foot of the mountains on the eastern edge of the Lemhi Range, serving as a hub for the region's historic mining activity. High-altitude operations such as the Portland Mine, Latest Out Mine, and Hilltop Mine are scattered across the slopes of Portland Mtn, reflecting an era of intense resource extraction. The presence of the Gilmore & Pittsburgh RR grade illustrates the vital transportation link that once connected these remote camps to broader markets.

Southward, the landscape transitions into the Little Lost River Valley, where water sources like Barney Hot Springs and Moffett Springs punctuate the arid Sawmill Flats. The division between the Salmon National Forest, Challis National Forest, and Targhee National Forest underscores the complex public land management in this part of Idaho. From the high peaks like Negro Peak to the deep recesses of Sawmill Canyon, this survey records a rugged transition between industrial mining interests and the sprawling national forests.