Blair Valley
Basin in San Diego County, California · on the USGS Earthquake Valley quadrangle
33.03282, -116.40418
Maps that show Blair Valley
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Earthquake Valley, CA — USGS 7.5-minute topo (2021)
USGS Topo Maps (public domain) · California
Public domain
Borego, CA — USGS historical 15-minute topo (1942)
USGS Historical Topo Maps (public domain) · California
Public domain
Borrego, CA — USGS historical 15-minute topo (1939)
USGS Historical Topo Maps (public domain) · California
Public domain
Borrego, CA — USGS historical 15-minute topo (1959)
USGS Historical Topo Maps (public domain) · California
Public domain
San Felipe Valley Wildlife Area — California CDFW
California CDFW Wildlife Area Maps · California
Public domain
Routes of Travel for Eastern San Diego County — BLM California (2021)
BLM Recreation Maps (public domain) · California
Public domain
IFR Enroute Low Altitude Chart L-04 (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
Nearby
Name, class, county and location: USGS Geographic Names Information System (public domain).