2011 Map of Last Chance Reservoir

About this map

Willow Creek and its many tributaries carve through the expansive grasslands of Valley County, defining the hydrologic character of this high-plains landscape. In the northeastern corner, the Last Chance Reservoir serves as a critical water catchment, a testament to the infrastructure required for ranching and land management in this arid region. The drainage network is further structured by the West Fork Willow Creek, which meanders across the southern sections of the map. Local landmarks like Wild Horse Flat and the Etchart Dam indicate the intersection of the natural terrain with regional land use, where natural depressions and engineered barriers manage the flow of seasonal water. This 2011 survey captures the vast, open character of the Montana prairie, highlighting how subtle shifts in elevation and water availability dictate the layout of this remote landscape.