Horseshoe Island
Island in Clatsop County, Oregon · on the USGS Knappa quadrangle
46.23372, -123.55930
Maps that show Horseshoe Island
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Knappa, OR — USGS 7.5-minute topo (2024)
USGS Topo Maps (public domain) · Oregon
Public domain
Svensen, OR — USGS historical 15-minute topo (1940)
USGS Historical Topo Maps (public domain) · Oregon
Public domain
Svensen, OR — USGS historical 15-minute topo (1955)
USGS Historical Topo Maps (public domain) · Oregon
Public domain
IFR Enroute Low Altitude Chart L-01 (U.S.) — FAA, 2026-10-29
FAA IFR Enroute Charts (public domain)
Public domain
IFR Enroute High Altitude Chart H-03 (U.S.) — FAA, 2026-10-29
FAA IFR Enroute Charts (public domain)
Public domain
IFR Enroute High Altitude Chart H-01 (U.S.) — FAA, 2026-10-29
FAA IFR Enroute Charts (public domain)
Public domain
IFR Enroute Low Altitude Chart L-01 (Alaska) — FAA, 2026-10-29
FAA IFR Enroute Charts (public domain)
Public domain
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Name, class, county and location: USGS Geographic Names Information System (public domain).