Helmet Rock
Island in San Francisco County, California · on the USGS San Francisco North quadrangle
37.80187, -122.48192
Maps that show Helmet Rock
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San Francisco North, CA — USGS 7.5-minute topo (2021)
USGS Topo Maps (public domain) · California
Public domain
San Francisco, CA — USGS historical 15-minute topo (1895)
USGS Historical Topo Maps (public domain) · California
Public domain
San Francisco, CA — USGS historical 15-minute topo (1899)
USGS Historical Topo Maps (public domain) · California
Public domain
San Francisco, CA — USGS historical 15-minute topo (1915)
USGS Historical Topo 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 Low Altitude Chart L-03 (U.S.) — FAA, 2026-10-29
FAA IFR Enroute Charts (public domain)
Public domain
IFR Enroute Low Altitude Chart L-11 (U.S.) — FAA, 2026-10-29
FAA IFR Enroute Charts (public domain)
Public domain
IFR Enroute High Altitude Chart H-04 (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
Nearby
Name, class, county and location: USGS Geographic Names Information System (public domain).