Gifford-Hill Lake
Reservoir in Clay County, Texas · on the USGS Thornberry quadrangle
34.02510, -98.37699
Maps that show Gifford-Hill Lake
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Thornberry, TX-OK
USGS topo, 2022
Randlett, OK
USGS historical 15-minute topo (1957)
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-17 (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).