2020 Map of Cedar Coulee

About this map

The Missouri River carves a deep path through this portion of Roosevelt County, defining the boundary with Richland County to the south. This landscape is characterized by a complex network of dry washes and ravines, including the named drainage systems of Cedar Coulee, Wells Coulee, and Star Coulee. These features emphasize the dramatic erosion of the northern plains, where flat uplands drop sharply toward the river valley. The map reveals a sparsely populated region primarily accessed by rural routes such as RD 1012 and Co RD 342, while Harmon Reservoir provides a critical water source in the northeastern corner. Topographical details like Rocky Point Coulee and Coal Coulee suggest a history of local geographic naming tied to specific terrain landmarks and potential early resource identification.