Missouri Coteau

The Missouri Coteau is a massive plateau consisting of rugged glacial hills that stretches diagonally across the northern Great Plains of North America. It extends from South Dakota in the United States up through North Dakota and into the Canadian provinces of Saskatchewan and Alberta. It serves as a distinct geographical boundary separating the Missouri River basin from the flat interior plains.

The unique landscape of the Missouri Coteau was formed by massive glacial action during the last ice age. As the glaciers retreated, they left behind thousands of feet of glacial till—unsorted sand, gravel, and boulders—creating the region's hilly, uneven terrain. Meltwater streams also carved out the complex drainage systems visible today.

While the Missouri Coteau is part of the broader Great Plains region, it is specifically distinguished by its rugged, hilly topography, which contrasts sharply with the incredibly flat land surrounding it. It acts as a physical escarpment, separating the Central Lowlands from the Great Plains proper. This elevation change creates unique microclimates and wetland habitats.

Because of its rugged glacial hills and rocky till, the Missouri Coteau is not as well-suited for intensive row-crop farming as the flatter plains nearby. Instead, the region is predominantly used for cattle ranching and hay production. The numerous pothole wetlands scattered across the plateau also make it a vital area for waterfowl production.