2020 Map of Twin Forks Reservoir

About this map

Twin Forks Reservoir and Upper Magpie Reservoir anchor the water management landscape of this Dawson County region. The terrain is defined by dramatic elevation changes, notably at Blue Mtn in the north and the prominent Rattlesnake Butte to the south. This area demonstrates a sophisticated irrigation and drainage network through features like the Labelle Ditch, which cuts through the southern reaches near Kelly Draw. The natural drainage is dictated by seasonal watercourses, including Magpie Cr, Frank Cr, and Glendive Cr, which carve through the high plains. A single primary road, RD 114, provides the only major vehicle access through this remote portion of eastern Montana, illustrating the sparse settlement patterns typical of the state's rugged rangelands.