Shirley Knobs
Summit in Huntingdon County, Pennsylvania · on the USGS Butler Knob quadrangle
40.32518, -77.88630
Maps that show Shirley Knobs
Get them in the map app
Butler Knob, PA
Detailed map of terrain, trails and roads
USGS topo, 2023
Mt Union, PA
Old map for history, not navigation
USGS historical 15-minute topo (1922)
Mt Union, PA
Old map for history, not navigation
USGS historical 15-minute topo (1924)
Mt Union, 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 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-36 (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
Name, class, county and location: USGS Geographic Names Information System (public domain).