Hallock Lake
Reservoir in Harrison County, Missouri · on the USGS Gardner quadrangle
40.34644, -93.93998
Maps that show Hallock Lake
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Gardner, MO
USGS topo, 2021

Blythedale, MO
USGS historical 15-minute topo (1947)

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 Low Altitude Chart L-12 (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).