Lake Johnston
Reservoir in Butler County, Pennsylvania · on the USGS Eau Claire quadrangle
41.15506, -79.76977
Maps that show Lake Johnston
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Eau Claire, PA
Detailed map of terrain, trails and roads
USGS topo, 2023
Hilliards, PA
Old map for history, not navigation
USGS historical 15-minute topo (1910)
Hilliards, PA
Old map for history, not navigation
USGS historical 15-minute topo (1912)
Hilliards, PA
Old map for history, not navigation
USGS historical 15-minute topo (1944)
Bureau of Land Management Eastern States Overview map
BLM Eastern States (2019)
IFR Enroute Low Altitude Chart L-29 (U.S.)
FAA, 2026-10-29
IFR Enroute Low Altitude Chart L-30 (U.S.)
FAA, 2026-10-29
IFR Enroute Low Altitude Chart L-32 (U.S.)
FAA, 2026-10-29
IFR Enroute High Altitude Chart H-11 (U.S.)
FAA, 2026-10-29
IFR Enroute High Altitude Chart H-10 (U.S.)
FAA, 2026-10-29
IFR Enroute High Altitude Chart H-12 (U.S.)
FAA, 2026-10-29
Name, class, county and location: USGS Geographic Names Information System (public domain).