Sister Islands
Island in Door County, Wisconsin · on the USGS Ephraim quadrangle
45.22443, -87.14622
Maps that show Sister Islands
Get them in the map app
Ephraim, WI
Detailed map of terrain, trails and roads
USGS topo, 2022
Sister Bay, WI
Old map for history, not navigation
USGS historical 15-minute topo (1960)
Bureau of Land Management Eastern States Overview map
BLM Eastern States (2019)
IFR Enroute Low Altitude Chart L-31 (U.S.)
FAA, 2026-10-29
IFR Enroute High Altitude Chart H-02 (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).