
The Elkhorn Mountains and Big Belt Mountains flank the upper Missouri River valley in this mid-1970s topographic study. The landscape is defined by its deep mining heritage, particularly in the west where a dense concentration of historical operations like the Elkhorn Mine, Golden Moss Mine, and Diamond Hill Mine dot the drainages. These mining sites are interconnected by primitive roads and pack trails, illustrating the extractive industry's reach into the high country of the Helena National Forest and Deerlodge National Forest.
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1886 · Fort Logan
USGS Topo · 1:250,000
1886 · Little Belt Mts.
USGS Topo · 1:250,000
1888 · Three Forks
USGS Topo · 1:250,000
1889 · Helena
USGS Topo · 1:250,000
1891 · Livingston
USGS Topo · 1:250,000
1893 · Helena
USGS Topo · 1:250,000
1893 · Dillon
USGS Topo · 1:250,000
1893 · Livingston
USGS Topo · 1:250,000
1894 · Three Forks
USGS Topo · 1:250,000
1894 · Little Belt Mts.
USGS Topo · 1:250,000