Backbone Ridge
Ridge in Shasta County, California · on the USGS Bella Vista quadrangle
40.72637, -122.16483
Maps that show Backbone Ridge
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Bella Vista, CA — USGS 7.5-minute topo (2023)
USGS Topo Maps (public domain) · California
Public domain
Millville, CA — USGS historical 15-minute topo (1953)
USGS Historical Topo Maps (public domain) · California
Public domain
OSVUM — Lassen National Forest (2023)
Forest Service Maps (public domain) · Lassen National Forest
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-11 (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
Name, class, county and location: USGS Geographic Names Information System (public domain).