Duck Marshes
Reservoir in Clearfield County, Pennsylvania · on the USGS The Knobs quadrangle
41.23386, -78.32833
Maps that show Duck Marshes
Get them in the map app
The Knobs, PA
Detailed map of terrain, trails and roads
USGS topo, 2023
Clearfield, PA
Old map for history, not navigation
USGS historical 15-minute topo (1929)
Clearfield, PA
Old map for history, not navigation
USGS historical 15-minute topo (1932)
Bureau of Land Management Eastern States Overview map
BLM Eastern States (2019)
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).