1886 Map of Great Falls

To the north, the terrain transitions into the high plains of Choteau County, marked by isolated water sources such as Satatine and 28 mile Spring. Military history is represented by Fort Shaw along the Sun River, while the northern boundary is traced by the winding Teton River near Perrysburg. The map captures the territory of Lewis and Clarke and Meagher counties before later political subdivisions, showing the early ranching and mission-era footprint of central Montana.