2021 Map of Millboro

About this map

The Millboro settlement and surrounding plains in Tripp County are defined by the meandering course of the Keya Paha River, which cuts a distinct valley through this section of the South Dakota landscape. The map reveals a highly structured grid of section lines and local roads, including 310th Ave and 312th Ave, which serve the agricultural region near the Nebraska border. Genealogy and local history researchers will find the Ascension Chapel Cem south of the river, a notable landmark in this rural territory. Drainage for the upland areas is provided by several named tributaries, such as Willow Cr, Cottonwood Cr, and Last Cr, illustrating the hydrographic network that supported the early homesteads and ranching operations of the South Dakota prairie.