2017 Map of Iron Post Buttes SE

About this map

Lake Oahe dominates this central South Dakota landscape, where the reservoir waters have reshaped the historic course of the Missouri River. The map illustrates the convergence of three counties—Sully, Stanley, and Hughes—along the winding banks of the reservoir. To the southeast, the expansive Peoria Flats provides a rare area of level ground amidst a series of deeply incised drainages such as Red Woman Cr and Sully Cr. This terrain pattern reveals the complex erosion of the river bluffs, where named routes like Gumbo Rd and Snake Creek Rd navigate the high ground between fingers of the lake. Small tributaries like Dry Cr and Plum Cr further illustrate the drainage network that feeds into the Missouri valley from the surrounding plains.