Sand Ridge
Ridge in Christian County, Illinois · on the USGS Mount Auburn quadrangle
39.75440, -89.30403
Maps that show Sand Ridge
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Mount Auburn, IL
Detailed map of terrain, trails and roads
USGS topo, 2024

Mechanicsburg, IL
Old map for history, not navigation
USGS historical 15-minute topo (1954)

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

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).