Keystone Mountain
Summit in Sierra County, California · on the USGS Sierra City quadrangle
39.53958, -120.67277
Maps that show Keystone Mountain
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Sierra City, CA
USGS topo, 2021
Sierra City, CA
USGS historical 15-minute topo (1955)
Tahoe National Forest Motor Vehicle Use Map (MVUM)
Sheet 1 Back, Yuba River North (2026)
Over Snow Vehicle Use Map (OSVUM)
Tahoe National Forest
IFR Enroute Low Altitude Chart L-02 (U.S.)
FAA, 2026-10-29
IFR Enroute Low Altitude Chart L-03 (U.S.)
FAA, 2026-10-29
IFR Enroute Low Altitude Chart L-09 (U.S.)
FAA, 2026-10-29
IFR Enroute Low Altitude Chart L-11 (U.S.)
FAA, 2026-10-29
IFR Enroute High Altitude Chart H-04 (U.S.)
FAA, 2026-10-29
IFR Enroute High Altitude Chart H-03 (U.S.)
FAA, 2026-10-29
Nearby
Name, class, county and location: USGS Geographic Names Information System (public domain).