2017 Map of Thompson Coulee

About this map

Knox Ridge and the winding course of Knox Ridge Rd define the high ground in this section of Fergus County. The landscape is deeply incised by a series of drainages, most notably Thompson Coulee and Sawmill Coulee, which create a complex network of ridges and troughs. These topographical features dictate the local movement of water through Sourdough Cr and Armells Cr, while Snell Ridge provides a distinct landmark in the southern reaches. The map illustrates a contemporary rural Montana environment where the geography remains the primary driver of infrastructure, with roads following the natural contours of the ridges to avoid the steep drops into Antelope Coulee and the surrounding drainages.