
Castle Butte rises above the headwaters of several key drainage systems in Fergus County, including the north-flowing Casino Creek and Mill Creek. This landscape is defined by its network of watercourses and the canyons they carve, most notably Lyon Canyon in the southeast. Modern access points like the Cottonwood Trailhead Acc suggest a transition toward recreation in an area traditionally shaped by rural ranching and land management. The presence of established corridors like Single Pine Rd, Natal Rd, and Flower Hills Rd provides a clear view of the contemporary road network through these Montana highlands. Smaller tributaries such as Spring Branch and the winding Cottonwood Creek weave through the township boundaries of T14N R18E and T13N R18E, illustrating the complex topography that dictates movement and land use in this part of the state.
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1889 · Big Snowy Mountain
USGS Topo · 1:250,000
1893 · Big Snowy Mountain
USGS Topo · 1:250,000
1941 · Lewistown
USGS Topo · 1:62,500
1944 · Lewistown
USGS Topo · 1:62,500
1954 · Roundup
USGS Topo · 1:250,000
1954 · Lewistown
USGS Topo · 1:250,000
1958 · Roundup
USGS Topo · 1:250,000
1959 · Lewistown
USGS Topo · 1:250,000
1970 · Glengarry
USGS Topo · 1:24,000
1970 · Crystal Lake
USGS Topo · 1:24,000