Boulder Bottoms (historical)
Flat in Clinton County, Illinois · on the USGS Boulder quadrangle
38.69116, -89.24813
Maps that show Boulder Bottoms (historical)
Get them in the map app
Boulder, IL
Detailed map of terrain, trails and roads
USGS topo, 2024
Centralia, IL
Old map for history, not navigation
USGS historical 15-minute topo (1914)
Centralia, IL
Old map for history, not navigation
USGS historical 15-minute topo (1935)
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
Nearby
Name, class, county and location: USGS Geographic Names Information System (public domain).