2021 Map of Lost Springs NW

About this map

Twentymile Cr and its tributaries define the drainage patterns of this high plains landscape along the Converse and Niobrara County line. The map reveals a highly dissected terrain characterized by numerous draws, including Baby Springs Draw, Flat Top Draw, and the uniquely named Dumbell Rock Draw. These features suggest a landscape shaped by seasonal water flow, where land use is tied closely to the available water sources like Spring Br Harney Cr and W Harney Cr. Transportation is limited to a sparse network of rural routes such as Co Rd 53 and Twenty Mile Creek Rd, which follow the natural contours and valley floors. This 2021 survey by the U.S. Geological Survey provides an intricate look at the hydrology of the region, including the headwaters of Cottonwood Cr and the convergence of E Harney Cr and Harney Cr.