Clamshell Peak, California

Prominence: 280 ft, 85 m

Elevation: 4360+ feet, 1329+ meters

True Isolation: 0.41 mi, 0.66 km
Elevation Info:Elevation range: 4360 - 4400 ft
    (40-foot closed contour)
NAVD88 Elevation: 4363 ft / 1330 m
    (Range 4363 - 4403 ft)
Latitude/Longitude (WGS84)34° 12' 6'' N, 117° 59' 53'' W
34.201576, -117.998152 (Dec Deg)
408039 E 3784957 N, Zone 11 (UTM)
CountryUnited States
County/Second Level RegionLos Angeles

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Other Web Sites
     Clamshell Peak at

Weather and Snow
     National Weather Service Forecast
     NOAA Snow Depth Map

Lists that contain Clamshell Peak:
     Comprehensive Combo Angeles Chapter List (Rank #621)
     Sierra Club Lower Peaks Committee (Rank #21)

Ascent Info

Total ascents/attempts logged by registered users: 130
     Show all viewable ascents/attempts (Total: 120)

Selected Trip Reports:
     2007-01-15 by Bob Burd
     2008-12-28 by Srikant Jayaraman
     2011-10-24 by Sean Green
     2013-01-13 by Marit Chrislock
     2013-03-13 by Patrick ONeill (GPS Track)
     2013-12-21 by Gil Barron
     2014-04-24 by Winnette Butler
     2014-05-16 by Pat Wells (Unsuccessful)
     2014-06-27 by Keith Winston (GPS Track)
     2015-03-20 by Greg Gerlach (GPS Track)
     2016-05-01 by Trevor Kent
     2017-08-18 by David Comerzan
     2018-02-08 by Pat Wells
     2019-01-06 by Garrett McLean (GPS Track)
     2019-02-12 by Mike Maki (GPS Track)
     2020-02-17 by Gordon Jenkins (GPS Track)

Nearby Peak Searches:
     Radius Search - Nearest Peaks to Clamshell Peak
     Elevation Ladder from Clamshell Peak
     Prominence Ladder from Clamshell Peak

Click on photo for original larger-size version.
View south from Clamshell of the San Gabriel Valley (2019-02-12). Photo by Mike Maki.
Click here for larger-size photo.
Web Map LinksPeakfinder Panorama
GeoHack Links   CalTopo   MyTopo   Bing Maps
Google Maps   Open Street Map
ProminenceKey Col Page  (Detailed prominence information)
  Clean Prominence: 280 ft/85 m
  Optimistic Prominence: 360 ft/109 m
  Key Col: 4080 ft/1244 m
IsolationIsolation Page  (Detailed isolation information)
   Distance: 0.41 mi/0.66 km
   Isolation Limit Point: 34.2042, -117.9917
Nearest Higher Neighbor in the PBC database:
    Rankin Peak  (ENE)
RangesContinent: North America
Range2: Pacific Ranges
Range3: Central and Southern California Ranges
Range4: Transverse Ranges
Range5: San Gabriel Mountains
Drainage BasinsLos Angeles
Pacific-Western USA
Pacific Ocean
OwnershipLand: Angeles National Forest
Topo MapAzusa O34117b8 1:24,000
Data Source1:25,000 (or larger) Topographic Survey Map
Dynamic Map

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