2021 Map of Rattlesnake Lake SW

About this map

The Cheyenne River cuts a deep, winding path through this western South Dakota landscape, marking the boundary between Ziebach and Haakon counties. The river's course is flanked by distinctive landforms, including the low-lying White Thunder Bottom and the expansive Milesville Flat to the south. This ranching territory is defined by a dense network of drainage draws and creeks, such as Straighthead Cr, Harding Cr, and Bull Cr, which reveal the erosional patterns typical of the region. A sparse grid of rural roads, including Milesville Rd, River Rd, and Bia HWY 8, connects the remote homesteads. The map illustrates the transition from the high prairie flats down to the breaks and bottoms of the river valley, offering a detailed look at the land's hydrology and topography.