1985 Map of Mount Thompson

About this map

Deerlodge National Forest and Helena National Forest meet in this high-altitude landscape of the mid-1980s, where the legacy of Montana mining is etched into the topography. The terrain is defined by prominent peaks like Mount Thompson and Sugarloaf Mountain, and drained by a complex network of waterways including Cataract Creek and Amazon Creek. This era of the map captures the industrial footprint of the region, most notably at the Comet Mine and several scattered Mine Shafts. The presence of an Abandoned RR and an Abandoned Railroad following the course of the Boulder River provides a clear trace of the transportation corridors that once served the mineral-rich gulches of the Elkhorn Mountains. For those studying the evolution of Jefferson County, the map offers detailed naming of local landmarks such as Boulder Chief Park and Occidental Plateau.