2024 Map of Cedar Coulee

About this map

The Missouri River cuts a wide, winding path through this portion of eastern Montana, serving as the natural boundary between Roosevelt and Richland counties. The landscape is defined by a dense network of erosional drainages that feed toward the river valley, including Cedar Coulee, Coal Coulee, and Star Coulee. These features illustrate the deeply dissected nature of the plains in this region, where intermittent watercourses have carved significant breaks into the high ground. To the north, Harmon Reservoir provides a managed water source amidst the ridgelines, while a series of rural routes such as RD 2060 and RD 1012 navigate the township and range lines. The map reveals the intricate topographic detail of the breaks near Rocky Point Coulee and Deep Coulee, offering a look at the land's character before modern developments changed the local grazing and agricultural patterns.