2017 Map of Lost River

About this map

The Milk River meanders through the northern reaches of this landscape near the border of Montana and Alberta, Canada. This 2017 survey by the U.S. Geological Survey reveals a section of Hill County defined by dramatic topography and deeply cut drainage patterns. The confluence of the Lost River with the Milk River forms a central geographical feature, while the surrounding high ground is dissected by various named dry washes and ravines, including the expansive Sahara Coulee in the central portion and Ninemile Coulee to the south. The sparse human footprint in this northern Montana borderland is limited to a network of section-line roads, such as RD 135 N, RD 240 N, and RD 165 N, which provide access through the sprawling prairie and rugged coulee systems like Spring Coulee.