Download PDF Prairie du Rocher (IL) USGS topo maps. These are full-sheet 7.5 Minute (1:24,000 scale) topographic maps. The red outline on the map below identifies the boundaries of the Prairie du Rocher topo map.
Prairie du Rocher topo maps are provided as PDF files.
Note: The most current map is the 2021 Prairie du Rocher topographic map.