Petrolia Lake dominates the western edge of this central Montana landscape, where the high plains meet a complex network of seasonal drainages. The topography is defined by significant coulees and ridges, including the deep-cut Johnson Coulee and the uniquely named Racehorse Coulee. These features illustrate the erosion patterns characteristic of Petroleum County, where waterways like Flatwillow Cr and McDonald Cr carve through the arid terrain.
13 named features on this map. Tap any name to fly to it.
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This is the sole edition of this map. No revisions or reprints were ever made.
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
1963 · Kelley
USGS Topo · 1:24,000
1963 · Petrolia Lake
USGS Topo · 1:24,000
1963 · Breed Spring
USGS Topo · 1:24,000
1963 · Mud Spring
USGS Topo · 1:24,000
1986 · Cat Creek
USGS Topo · 1:24,000
1986 · Ingals Dam
USGS Topo · 1:24,000