Ross Fork Cr and its tributaries, including Little Trout Cr and Olsen Cr, carve a network of drainage patterns across this Central Montana landscape. The area is defined by a series of geographic coulees such as Big Coulee, Weber Coulee, and Hauck Coulee, which shape the local topography around the high plains. Small settlements and ranching hubs like Hobson, Hauck, and Sipple serve as the primary points of human activity, connected by a grid of rural roads such as Gumbo Flats Rd and Bullhaven Rd.
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1889 · Big Snowy Mountain
USGS Topo · 1:250,000
1893 · Big Snowy Mountain
USGS Topo · 1:250,000
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 · Buffalo
USGS Topo · 1:24,000
1970 · Moore
USGS Topo · 1:24,000
1970 · Martin Coulee
USGS Topo · 1:24,000
1970 · Moccasin
USGS Topo · 1:24,000