
The confluence of the Clark Fork and Blackfoot River shapes the development of this Montana corridor, where the city of Missoula serves as a major hub for education and industry. At the western edge, the University of Montana campus anchors the urban center, while small neighboring settlements like East Missoula, Milltown, and Bonner trace the river valley eastward. The landscape is defined by the sharp transition from the valley floor to the high elevations of the Garnet Range and the Sapphire Mountains, where historical extraction sites such as the Copper Cliff Mine and Whaley Mine reflect the region's mineral-rich history.
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1889 · Helena
USGS Topo · 1:250,000
1893 · Helena
USGS Topo · 1:250,000
1899 · Helena
USGS Topo · 1:250,000
1901 · Hamilton
USGS Topo · 1:125,000
1902 · Ovando
USGS Topo · 1:125,000
1903 · Coopers Lake
USGS Topo · 1:125,000
1903 · Bonner
USGS Topo · 1:125,000
1903 · Helena
USGS Topo · 1:250,000
1905 · Ovando
USGS Topo · 1:125,000
1908 · Philipsburg
USGS Topo · 1:125,000