Grindstone Gap
Gap in Centre County, Pennsylvania · on the USGS Bear Knob quadrangle
40.96506, -77.89361
Maps that show Grindstone Gap
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Bear Knob, PA
Detailed map of terrain, trails and roads
USGS topo, 2023
Bellefonte, PA
Old map for history, not navigation
USGS historical 15-minute topo (1908)
Bellefonte, PA
Old map for history, not navigation
USGS historical 15-minute topo (1909)
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-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-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).