Rock Island Lake
Lake in Tuolumne County, California · on the USGS Matterhorn Peak quadrangle
38.07384, -119.47388
Maps that show Rock Island Lake
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Matterhorn Peak, CA
USGS topo, 2026
Matterhorn Peak, CA
USGS historical 15-minute topo (1956)
IFR Enroute Low Altitude Chart L-02 (U.S.)
FAA, 2026-10-29
IFR Enroute Low Altitude Chart L-03 (U.S.)
FAA, 2026-10-29
IFR Enroute Low Altitude Chart L-09 (U.S.)
FAA, 2026-10-29
IFR Enroute Low Altitude Chart L-11 (U.S.)
FAA, 2026-10-29
IFR Enroute High Altitude Chart H-04 (U.S.)
FAA, 2026-10-29
IFR Enroute High Altitude Chart H-03 (U.S.)
FAA, 2026-10-29
Nearby
Name, class, county and location: USGS Geographic Names Information System (public domain).