Threemile Harbor
Bay in Suffolk County, New York · on the USGS Gardiners Island West quadrangle
41.02010, -72.19063
Maps that show Threemile Harbor
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Gardiners Island West, NY
Detailed map of terrain, trails and roads
USGS topo, 2023
Gardiners Island, NY
Old map for history, not navigation
USGS historical 15-minute topo (1903)
Gardiners Island, NY
Old map for history, not navigation
USGS historical 15-minute topo (1904)
Gardiners Island, NY
Old map for history, not navigation
USGS historical 15-minute topo (1921)
Bureau of Land Management Eastern States Overview map
BLM Eastern States (2019)
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).