2017 Map of Harper Coulee

About this map

Harper Coulee and its neighboring ravines define this corner of Musselshell County, where the high-altitude terrain of the Bull Mountains begins its descent. The landscape is characterized by a dense network of seasonal drainages and named coulees, including Hay Coulee, Lamott Coulee, and Road Coulee, which create a complex topographical pattern for ranchers and land managers. Remote water sources such as Thompsons Water Hole are critical landmarks in this arid environment, often joined by small ephemeral streams like Goulding Creek and Bullbreed Creek. While largely unpopulated, the area is accessible via a labyrinth of primitive roads and named paths such as Fossil Trail, Stampede Trail, and Roxy Trail. These routes follow the natural contours of the land, weaving between features like Grassy Flat and the rising slopes of the range.