2014 Map of Nolan Reservoir

About this map

Nolan Reservoir and its surrounding drainage systems define this high-plains landscape in Blaine County. The terrain is deeply incised by a network of seasonal watercourses and coulees, including Christensen Br and the rugged East Fork Black Coulee. These features represent the drainage patterns essential to the region's ranching and water management history. Prominent landmarks such as Lion Butte rise above the drainage basins of Lion Coulee and N Fork Lion Coulee, providing clear navigational markers for those traversing the open country. The presence of Bear Paw Springs suggests localized groundwater sources that have historically supported wildlife and livestock. The map also traces Cow Island Rd, a significant route through the undulating terrain, and identifies areas like Coal Mine Coulee that hint at the local geology and past resource extraction efforts in this part of Montana.