Highland Silver Lake
Reservoir in Madison County, Illinois · on the USGS Grantfork quadrangle
38.81150, -89.67591
Maps that show Highland Silver Lake
Get them in the map app
Grantfork, IL
Detailed map of terrain, trails and roads
USGS topo, 2024
New Douglas, IL
Old map for history, not navigation
USGS historical 15-minute topo (1937)
New Douglas, IL
Old map for history, not navigation
USGS historical 15-minute topo (1944)
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-27 (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).