2020 Map of Johnson Reservoir NW

About this map

The Big Sheep Mountains dominate the eastern landscape of this Dawson County region, where the terrain is deeply etched by a complex drainage system. Waterways including Bluff Cr and Brush Cr flow through the northern reaches, while the southern portion is defined by the headwaters of the Middle Fork Deer Cr, N Fork Deer Cr, and Corral Cr. This high-plains geography is largely characterized by open range and section-line movement, reflected in the grid of rural routes such as Rd 412 and Rd 427. The map illustrates the persistent structure of the Public Land Survey System, with township and range lines like t20n r51e providing the foundational framework for land ownership and navigation in this part of Montana. It is a portrait of a landscape where elevation and drainage patterns dictate the placement of local roads and cattle-country infrastructure.