Fourblock Island
Island in Lake of the Woods County, Minnesota · on the USGS Flag Island quadrangle
49.27500, -94.88551
Maps that show Fourblock Island
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Flag Island, MN-ON
Detailed map of terrain, trails and roads
USGS topo, 2022
Oak Island, MN
Old map for history, not navigation
USGS historical 15-minute topo (1918)
Bureau of Land Management Eastern States Overview map
BLM Eastern States (2019)
IFR Enroute High Altitude Chart H-02 (U.S.)
FAA, 2026-10-29
Nearby
Name, class, county and location: USGS Geographic Names Information System (public domain).