1985 Map of Roy NW

About this map

Snell Ridge and the winding course of the Sacagawea River characterize this landscape in central Montana. Surveyed in the late 1970s and edited by the U.S. Geological Survey in 1985, this topographic study documents the drainage patterns of Dry Armells Creek as it cuts through the local coulees. The terrain is defined by its intermittent watercourses, including Antelope Coulee and Blood Cr, which reveal the erosional history of the Fergus County region. The map provides a look at the area's geography before significant modern development, focusing on the natural contours and the relationship between high ridges and the river valley below.