
The community of Corvallis serves as the focal point of this western Montana landscape, situated at the eastern edge of the Bitterroot Valley. Settlement patterns here are defined by a grid of rural roads and orchards, with clusters of development near Cobb and Quast. The terrain transitions sharply from the agricultural flats near the Ravalli County Airport into the rising elevations of the Sapphire Mountains to the east. The Bitterroot National Forest boundary marks the beginning of this more vertical landscape, where drainages like Coyote Gulch and Charleys Gulch carve through the foothills. Local history is anchored at the Corvallis Cem, while the hydrological network of Willow Creek, Soft Rock Creek, and Coalpit Creek illustrates the vital water distribution required for the region's long-standing orchard and farming operations.
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1901 · Hamilton
USGS Topo · 1:125,000
1909 · Sapphire
USGS Topo · 1:125,000
1947 · Butte
USGS Topo · 1:250,000
1956 · Hamilton
USGS Topo · 1:250,000
1958 · Butte
USGS Topo · 1:250,000
1959 · Hamilton
USGS Topo · 1:250,000
1960 · Butte
USGS Topo · 1:250,000
1960 · Hamilton
USGS Topo · 1:250,000
1962 · Butte
USGS Topo · 1:250,000
1964 · Hamilton
USGS Topo · 1:250,000