Helfrichs Spring
Spring in Lehigh County, Pennsylvania · on the USGS Catasauqua quadrangle
40.62815, -75.49074
Maps that show Helfrichs Spring
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Catasauqua, PA
Detailed map of terrain, trails and roads
USGS topo, 2023
Allentown, PA
Old map for history, not navigation
USGS historical 15-minute topo (1894)
Allentown, PA
Old map for history, not navigation
USGS historical 15-minute topo (1939)
Allentown, PA
Old map for history, not navigation
USGS historical 15-minute topo (1957)
Bureau of Land Management Eastern States Overview map
BLM Eastern States (2019)
IFR Area Chart A-01 (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-33 (U.S.)
FAA, 2026-10-29
IFR Enroute Low Altitude Chart L-34 (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
Nearby
Name, class, county and location: USGS Geographic Names Information System (public domain).