1987 Map of Gilmore

About this map

The mining settlement of Gilmore sits at the edge of the Lemhi Range, where industrial activity once dominated the slopes of the Salmon National Forest and Challis National Forest. By the late 20th century, this map records an extensive network of extractive history, marked by numerous prospects, adits, and mine shafts. Notable workings like the Brown Bull Mine, Ridgeway Mine, and Mountain Boy Mine dot the high elevations around Portland Mountain. The landscape is physically etched with the remains of former transport systems, most notably an Old Railroad Grade that winds through the foothills above Texas Creek. This juxtaposition of high-altitude wilderness, seen at Negro Peak and Mill Creek Lake, with the scarred terrain of the mining era, provides a detailed record of the region's complex economic and environmental history.