Double Rock
Island in Mendocino County, California · on the USGS Bear Harbor quadrangle
39.94154, -123.96891
Maps that show Double Rock
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Mattole River Ecological Reserve — California CDFW
California CDFW Wildlife Area Maps · California
Public domain
Bear Harbor, CA — USGS 7.5-minute topo (2021)
USGS Topo Maps (public domain) · California
Public domain
Piercy, CA — USGS historical 15-minute topo (1950)
USGS Historical Topo Maps (public domain) · California
Public domain
King Range National Conservation Area — BLM California (2024)
BLM Recreation Maps (public domain) · California
Public domain
IFR Enroute Low Altitude Chart L-02 (U.S.) — FAA, 2026-10-29
FAA IFR Enroute Charts (public domain)
Public domain
IFR Enroute High Altitude Chart H-03 (U.S.) — FAA, 2026-10-29
FAA IFR Enroute Charts (public domain)
Public domain
IFR Enroute High Altitude Chart H-01 (U.S.) — FAA, 2026-10-29
FAA IFR Enroute Charts (public domain)
Public domain
Nearby
Name, class, county and location: USGS Geographic Names Information System (public domain).