2020 Map of Brown Coulee

About this map

Lower Blacktail Reservoir sits at the southern edge of this landscape, fed by the seasonal drainage of E Blacktail Cr. This part of Rosebud County is defined by its dramatic drainage basins, where water has carved out deep depressions like Brown Coulee, Badland Coulee, and Hallanger Coulee. The terrain reveals a sparse network of ranching and land management infrastructure typical of eastern Montana, where human presence is largely limited to unpaved arteries like Kerns Rd. The map illustrates the Township and Range system in detail, showing the intersections of t11n r37e and surrounding survey blocks that organize this vast, open range. For researchers, the map provides a precise look at the hydrography and topography of the high plains just as they transition toward the Missouri River watershed to the north.