Upper Onion Valley
Flat in Amador County, California · on the USGS Bear River Reservoir quadrangle
38.56047, -120.18380
Maps that show Upper Onion Valley
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Bear River Reservoir, CA — USGS 7.5-minute topo (2021)
USGS Topo Maps (public domain) · California
Public domain
Silver Lake, CA — USGS historical 15-minute topo (1956)
USGS Historical Topo Maps (public domain) · California
Public domain
Over-Snow Vehicle Use Map — Stanislaus National Forest
Forest Service Maps (public domain) · Stanislaus 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-03 (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 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).