2012 Map of Hells Canyon

About this map

Hells Canyon defines the drainage patterns of this corner of Harding County, where the high plains transition into a complex network of seasonal creek beds and draws. The landscape is shaped by the headwaters and tributaries of the S Fork Moreau River, including the winding paths of Cady Cr and Valley Cr. Human activity is centered on ranching and water management, evidenced by the Dunn Ranch in the northeast and the Leger Dam which impounds local runoff. Transportation through this open country is maintained by a handful of established routes such as Co Hwy 897, Collins Rd, and Dillon Rd, providing access to isolated homesteads and grazing lands. In the southern reaches, Alkali Cr joins the larger river system, illustrating the delicate hydrology of South Dakota's western plains.