2014 Map of Donleys Reservoir

About this map

Donleys Reservoir sits at the heart of this high plains landscape in Rosebud County, serving as a vital water catchment in a region defined by complex drainage networks. The territory is carved by a series of deep coulees, including Larson Coulee and Machine Coulee, which channel seasonal runoff into major tributaries like Big Porcupine Cr. These drainages create a rhythmic topography of ridges and draws that have long dictated the movement of livestock and the placement of rural infrastructure.