Walker Lake
Reservoir in Grimes County, Texas · on the USGS Iola quadrangle
30.79116, -96.03115
Maps that show Walker Lake
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Iola, TX
USGS topo, 2022
Iola, TX
USGS historical 15-minute topo (1931)
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-19 (U.S.)
FAA, 2026-10-29
IFR Enroute High Altitude Chart H-06 (U.S.)
FAA, 2026-10-29
IFR Enroute Low Altitude Chart L-21 (U.S.)
FAA, 2026-10-29
Name, class, county and location: USGS Geographic Names Information System (public domain).