Mining operations define the character of this Granite County landscape, concentrated heavily along the western drainages. The Brewster Creek watershed is particularly active, containing the Jumbo Mine, Hidden Treasure Mine, and Alps Mine. These sites sit within a complex network of steep terrain marked by Mason Gulch and Highline Gulch, suggesting a long history of hard-rock extraction in the mountains. To the east, Sliderock Mountain stands as a prominent landmark overlooking the Harvey Creek and Eightmile Creek drainages.
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1903 · Bonner
USGS Topo · 1:125,000
1908 · Philipsburg
USGS Topo · 1:125,000
1909 · Sapphire
USGS Topo · 1:125,000
1919 · Drummond
USGS Topo · 1:125,000
1921 · Drummond
USGS Topo · 1:125,000
1947 · Butte
USGS Topo · 1:250,000
1958 · Butte
USGS Topo · 1:250,000
1959 · Bearmouth
USGS Topo · 1:62,500
1959 · Ravenna
USGS Topo · 1:62,500
1960 · Butte
USGS Topo · 1:250,000