2017 Map of Millboro

About this map

The small settlement of Millboro is situated in a landscape defined by the winding course of the Keya Paha River. This 2017 survey by the U.S. Geological Survey illustrates a rural South Dakota topography where several watercourses, including Willow Cr, Lost Cr, and Cottonwood Cr, drain through the surrounding breaks and river valleys. The map provides essential documentation for local history and genealogy, notably marking the Ascension Chapel Cem east of the main settlement. The land is organized by a systematic grid of section lines and secondary roads such as 310th Ave and 300th St, reflecting the enduring agricultural and ranching layout of Tripp County. This recent edition maintains the record of these sparsely populated plains, showing the relationship between small-town sites and the drainage systems of the Keya Paha watershed.