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Ascent of Clamshell Peak on 2015-03-20

Climber: Greg Gerlach

Others in Party:Kelley Laxamana
----Only Party on Mountain
Date:Friday, March 20, 2015
Ascent Type:Successful Summit Attained
Peak:Clamshell Peak
    Location:USA-California
    Elevation:4360 ft / 1328 m

Ascent Trip Report

Kelley and I picked up our permit to drive the Rincon-Red Box Road along with the combination for the locked gate from the Angeles National Forest office in Glendora. We drove up Highway 39, turned left onto the Rincon-Red Box Road, using the combination to open the gate, then followed the Rincon-Red Box Road about 10.5 miles to another locked gate, parking the truck next to the gate and about 1.2 miles short of the beginning of HPS route 4 to Monrovia Peak. The road is in excellent shape, but I recommend a vehicle with decent clearance to avoid the occasional rock. We hiked up the road and then HPS Route 4 to Monrovia Peak, then followed the ridge down about 1 mile to the Clamshell Road, climbing Rankin Peak along the way, then we went up the fire break to the top of Clamshell Peak. Kelley located the register in a concrete vault with a steel cover on it. To get back to the truck, we followed the Clamshell Road and then the Rincon-Red Box Road back to where we parked. Total stats: 9.2 miles, 5 hours round trip and about 3,550' of elevation gain.
Summary Total Data
    Total Elevation Gain:3550 ft / 1081 m
    Total Elevation Loss:3550 ft / 1081 m
    Round-Trip Distance:9.4 mi / 15.1 km
    Grade/Class:Class 1
Descent (To Destination) Statistics
    Gain on way in:1290 ft / 393 m
    Loss on way in:1450 ft / 441 m
    Distance:4.4 mi / 7.1 km
    Route:See GPS track & trip report
    Start Trailhead:Rincon-Red Box Road  4520 ft / 1377 m
Ascent (From Destination) Statistics
    Loss on way out:2100 ft / 640 m
    Gain on way out:2260 ft / 688 m
    Distance:5 mi / 8 km
    Route:See GPS track & trip report
    End Trailhead:Rincon-Red Box Road  4520 ft / 1377 m
GPS Data for Ascent/Trip


 GPS Waypoints - Hover or click to see name and lat/long
Peaks:  climbed and  unclimbed by Greg Gerlach
Click Here for a Full Screen Map
Note: GPS Tracks may not be accurate, and may not show the best route. Do not follow this route blindly. Conditions change frequently. Use of a GPS unit in the outdoors, even with a pre-loaded track, is no substitute for experience and good judgment. Peakbagger.com accepts NO responsibility or liability from use of this data.

Download this GPS track as a GPX file




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