Duncan Peak, CA — USGS historical 15-minute topo (1952)
by USGS Historical Topo Maps (public domain) · California, US
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Older edition. This is the 1952 edition from the U.S. Geological Survey. A newer one may have been published since; check the agency's page for current rules and routes before relying on it.

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Where this map covers
Named places on this map
56 named features inside the Duncan Peak, CA — USGS historical 15-minute topo (1952) sheet, from the USGS Geographic Names Information System. Each one links to every map that shows it.
Peaks and ridges
- American Hill
- Balloon Ridge · ridge
- Barney Cavanah Ridge · ridge
- Big Valley Bluff · ridge
- Canada Hill
- Chicken Hawk Ridge · ridge
- Codfish Point · ridge
- Cuckoo Ridge · ridge
- Deadwood Ridge · ridge
- Devils Thumb · pillar
- Duncan Peak
- End of the World · ridge
- Helester Point
- Hogback · ridge
- Humbug Ridge · ridge
- Iowa Hill Divide · ridge
- Little Bald Mountain
- Macedon Ridge · ridge
- Mineral Point · ridge
- Mosquito Ridge · ridge
- Peavine Ridge · ridge
- Ralston Ridge · ridge
- Red Star Point
- Sawtooth Ridge · ridge
and 5 more
Lakes, springs and falls
- Bear Spring · spring
- Brushy Spring · spring
- Corral Spring · spring
- Dawson Spring · spring
- Deller Spring · spring
- Drum Forebay · reservoir
- Goat Spring · spring
- Government Spring · spring
- Oxbow Reservoir · reservoir
- Skunk Spring · spring
- Tadpole Spring · spring
- Texas Hill Spring · spring
Gaps, arches and other landforms
- Bear Wallow · basin
- Big Crater · cliff
- Big Oak Flat · flat
- Butcher Flat · flat
- Byrds Valley · basin
- Devils Basin · basin
- Elliot Meadow · flat
- Ford Point · cape
- Little Crater · cliff
- Little Oak Flat · flat
- Mosquito Narrows · gap
- Red Point · cliff
- Robinsons Flat · flat
- Sailor Flat · flat
- Willmont Saddle · gap
Elevations are the USGS 3DEP ground elevation at the named point, rounded; a summit's surveyed height can differ a little.
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Version history
Version 1 · Nov 4, 2026 · 10.5 MB