Bald Knob
Summit in Union County, Illinois · on the USGS Cobden quadrangle
37.55215, -89.34651
Maps that show Bald Knob
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Cobden, IL
Detailed map of terrain, trails and roads
USGS topo, 2024

Alto Pass, IL
Old map for history, not navigation
USGS historical 15-minute topo (1924)

Alto Pass, IL
Old map for history, not navigation
USGS historical 15-minute topo (1947)

Alto Pass, IL
Old map for history, not navigation
USGS historical 15-minute topo (1949)

Mississippi Bluffs District Motor Vehicle Use Map (MVUM)
Forest roads and trails open to vehicles
Shawnee National Forest

Network to Freedom Brochure Map - National Underground Railroad Network to Freedom Program
National Park Service Maps · National Underground Railroad Network to Freedom Program

U.S. Fish and Wildlife Service Alligator Snapping Turtle Range (2024)
Fish & Wildlife Service Refuge Maps

Continental Glaciation Map - Tule Springs Fossil Beds National Monument
National Park Service Maps · Tule Springs Fossil Beds National Monument

Bureau of Land Management Eastern States Overview map
BLM Eastern States (2019)

IFR Enroute Low Altitude Chart L-16 (U.S.)
FAA, 2026-10-29

IFR Enroute High Altitude Chart H-05 (U.S.)
FAA, 2026-10-29
Name, class, county and location: USGS Geographic Names Information System (public domain).