Chelsea Island

Island in Roosevelt County, Montana · on the USGS Nickwall quadrangle

48.11446, -105.33527

Maps that show Chelsea Island

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Nickwall, MT — USGS 7.5-minute topo (2024)

Nickwall, MT

USGS topo, 2024

Chelsea, MT — USGS historical 15-minute topo (1912)

Chelsea, MT

USGS historical 15-minute topo (1912)

IFR Enroute High Altitude Chart H-02 (U.S.) — FAA, 2026-10-29

IFR Enroute High Altitude Chart H-02 (U.S.)

FAA, 2026-10-29

IFR Enroute Low Altitude Chart L-13 (U.S.) — FAA, 2026-10-29

IFR Enroute Low Altitude Chart L-13 (U.S.)

FAA, 2026-10-29

IFR Enroute High Altitude Chart H-01 (U.S.) — FAA, 2026-10-29

IFR Enroute High Altitude Chart H-01 (U.S.)

FAA, 2026-10-29

Nearby

Chelsea Slough

Name, class, county and location: USGS Geographic Names Information System (public domain).