Sourdough Spring
Spring in San Diego County, California · on the USGS Palomar Observatory quadrangle
33.36528, -116.83221
Maps that show Sourdough Spring
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Palomar Observatory, CA
USGS topo, 2021
Palomar Mountain, CA — USGS historical 15-minute topo (1939)
USGS Historical Topo Maps (public domain) · California
San Felipe Valley Wildlife Area — California CDFW
California CDFW Wildlife Area Maps · California
IFR Enroute Low Altitude Chart L-07 (U.S.) — FAA, 2026-10-29
FAA IFR Enroute Charts (public domain)
IFR Enroute Low Altitude Chart L-04 (U.S.) — FAA, 2026-10-29
FAA IFR Enroute Charts (public domain)
IFR Enroute High Altitude Chart H-04 (U.S.) — FAA, 2026-10-29
FAA IFR Enroute Charts (public domain)
IFR Enroute High Altitude Chart H-03 (U.S.) — FAA, 2026-10-29
FAA IFR Enroute Charts (public domain)
Nearby
Name, class, county and location: USGS Geographic Names Information System (public domain).