Rock Island Butte
Summit in Carbon County, Montana · on the USGS Fossil Lake quadrangle
45.00494, -109.79429
Maps that show Rock Island Butte
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Fossil Lake, MT-WY
USGS topo, 2024
Cooke City, MT
USGS historical 15-minute topo (1956)
IFR Enroute Low Altitude Chart L-11 (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-03 (U.S.)
FAA, 2026-10-29
IFR Enroute High Altitude Chart H-01 (U.S.)
FAA, 2026-10-29
Nearby
Name, class, county and location: USGS Geographic Names Information System (public domain).