Big Sky Colony and the nearby Rimrock Ranch define this pocket of Glacier County, characterized by a sparse network of prairie roads and deep drainage features. The landscape is marked by several significant coulees, including Little Rock Coulee to the east and both Cobell Coulee and Powell Coulee along the southern boundary. These seasonal watercourses carve through the terrain, dictating the placement of rural infrastructure like Horsethief Rd. This 2011 survey captures the area's agricultural organization, showing the relationship between established ranching outposts and the vast, open drainage basins typical of northern Montana's high plains.
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This is the sole edition of this map. No revisions or reprints were ever made.
1911 · Blackfoot
USGS Topo · 1:125,000
1960 · Cut Bank
USGS Topo · 1:250,000
1963 · Cut Bank
USGS Topo · 1:250,000
1964 · Cut Bank
USGS Topo · 1:250,000
1968 · Buffalo Lake
USGS Topo · 1:24,000
1968 · Rimrock Butte
USGS Topo · 1:24,000
1968 · Fort Piegan
USGS Topo · 1:24,000
1968 · Del Bonita
USGS Topo · 1:24,000
1968 · Sharp Lake
USGS Topo · 1:24,000
1968 · Landslide Butte
USGS Topo · 1:24,000