Twin Mounds
Summit in Payne County, Oklahoma · on the USGS Twin Mounds quadrangle
36.11398, -96.77370
Maps that show Twin Mounds
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Twin Mounds, OK
USGS topo, 2022
Ripley, OK
USGS historical 15-minute topo (1929)
Ripley, OK
USGS historical 15-minute topo (1932)
Network to Freedom Brochure Map - National Underground Railroad Network to Freedom Program
National Park Service Maps (public domain) · National Underground Railroad Network to Freedom Program
U.S. Fish and Wildlife Service Alligator Snapping Turtle Range (2024)
Fish & Wildlife Service Refuge Maps (public domain)
Bureau of Land Management Eastern States Overview map
BLM Eastern States (2019)
IFR Enroute Low Altitude Chart L-15 (U.S.)
FAA, 2026-10-29
IFR Enroute High Altitude Chart H-06 (U.S.)
FAA, 2026-10-29
Name, class, county and location: USGS Geographic Names Information System (public domain).