Ingalls Swamp
Swamp in Modoc County, California · on the USGS Whittemore Ridge quadrangle
41.68211, -120.69135
Maps that show Ingalls Swamp
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Whittemore Ridge, CA — USGS 7.5-minute topo (2021)
USGS Topo Maps (public domain) · California
Public domain

Big Sage Reservoir, CA — USGS historical 15-minute topo (1962)
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-09 (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 Low Altitude Chart L-13 (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).