
The Sacagawea River winds through the northern reaches of Petroleum County, cutting through a landscape defined by deep drainage patterns. This map documents a high-plains environment where water is the primary architect of the land, visible in the winding courses of Drag Creek and the etched paths of Hanson Coulee and Spring Coulee. These features represent the classic Missouri River breaks topography, providing vital landmarks for those navigating the eastern Montana backcountry.
10 named features on this map. Tap any name to fly to it.
Don’t see what you’re looking for? This feature index may not catch every label — zoom into the map to look around manually.
This is the sole edition of this map. No revisions or reprints were ever made.
1954 · Lewistown
USGS Topo · 1:250,000
1959 · Lewistown
USGS Topo · 1:250,000
1965 · Dry Coulee
USGS Topo · 1:24,000
1965 · Chain Buttes
USGS Topo · 1:24,000
1965 · Weingart Place
USGS Topo · 1:24,000
1965 · Weingart Place NW
USGS Topo · 1:24,000
1971 · Hanson Flat
USGS Topo · 1:24,000
1984 · Zortman
USGS Topo · 1:100,000
1985 · Kirkendal Flat
USGS Topo · 1:24,000
1985 · Brown Spring
USGS Topo · 1:24,000