2017 Map of Last Chance Reservoir

About this map

Last Chance Reservoir sits within a landscape defined by deep drainages and dry flats in Valley County. This northern Montana terrain is carved by complex coulee systems, including Chambers Coulee and Starbuck Coulee, which channel seasonal water toward Willow Cr. The map reveals the intricate Public Land Survey System divisions across township lines like T36N R37E and T35N R38E, illustrating how the vast northern plains were gridded for settlement and management. In the eastern reaches of the sheet, the expansive Wild Horse Flat contrasts with the notched topography of Cow Coulee, while the W Fork Willow Cr meanders through the southern sections. This survey provides a precise record of the water management and topographic character of the High Line region in the early twenty-first century.