Lake Thunderhawk
Reservoir in Johnson County, Illinois · on the USGS Creal Springs quadrangle
37.56172, -88.75506
Maps that show Lake Thunderhawk
Get them in the map app
Creal Springs, IL
Detailed map of terrain, trails and roads
USGS topo, 2024
Marion, IL
Old map for history, not navigation
USGS historical 15-minute topo (1925)
Marion, IL
Old map for history, not navigation
USGS historical 15-minute topo (1940)
Hidden Springs 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
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).