1986 Map of Big Wall NW

About this map

Little Wall Creek and Crooked Creek carve through this section of central Montana, which straddles the border of Petroleum Co and Musselshell Co. The terrain is defined by the broad topographic depression of the Devils Basin, a significant landform for local ranchers and geologists alike. This 1986 provisional edition, based on field checks from the late 1970s, captures a sparsely settled landscape where human activity is limited to a few specific utilitarian sites. Functional landmarks such as a Gravel Pit, a Corral, and a single irrigation Ditch point to the area's primary use for livestock grazing and road maintenance. The intricate contour work illustrates the complex drainage patterns of the high plains, showing the transition between the dry upland basins and the creek valleys.