2017 Map of Rocky Coulee SW

About this map

The Marias River winds through the southern reaches of this landscape in Hill County, cutting a deep valley that contrasts with the surrounding high plains. This 2017 study illustrates the drainage patterns of the region, where numerous ephemeral channels like Eightmile Coulee and Flat Coulee converge toward the river system. The terrain is largely defined by the Public Land Survey System grid, with section lines marking the transition between townships t30n r8e and t29n r8e. Human presence is traced through a sparse network of rural routes, including Tiber Dam Rd and O'Neil Dr, which provide access across the open Montana benchland. To the northeast, the topography shifts around Black Coulee, showcasing the erosion-shaped landforms characteristic of this part of the state.