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Cornerstone Boulder

Routes Sorted
L to R R to L Alpha
Cornerstone Left to Right 
Cornerstone Lefthand 
Cornerstone Right to Left 
Cornerstone Righthand 

Cornerstone Boulder  


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Location: 33.9826, -117.3929 View Map  Incorrect?
Page Views: 1,276
Administrators: C Miller, Euan Cameron, M.Morley, Adam Stackhouse, Salamanizer, Justin Johnsen, Kristine Hoffman (sitewide)
Submitted By: Euan Cameron on Jan 13, 2009
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Going for the lip on Cornerstone Lefthand.

Description 

This small boulder lies west from Borson's Wall next to the path on the inside of the bend.

It has some pleasant, although all too short problems, but its definitely worth stopping at.

Getting There 

Park at the San Andreas / Glenwood parking area. Head up the paved road passed the gate. Follow the road / path as it winds its way up the hill. The road heads North, then South and finally swings back North near the crest of the hill. Follow the road until you come to a small bridge. Drop down to the path below and follow this path East / North East. As the road swings left the boulder is on your left.

Climbing Season



Weather station 3.3 miles from here

4 Total Routes

['4 Stars',0],['3 Stars',0],['2 Stars',2],['1 Star',2],['Bomb',0]
['<=5.6',0],['5.7',0],['5.8',0],['5.9',0],['5.10',0],['5.11',0],['5.12',0],['5.13',0],['>=5.14',0],['',0],['<=V1',2],['V2-3',2],['V4-5',0],['V6-7',0],['V8-9',0],['V10-11',0],['V12-13',0],['>=V14',0]


Featured Route For Cornerstone Boulder
Cornerstone Lefthand (V0-), Mt. Rubidoux.

Cornerstone Lefthand V0- 4-  CA : Inland Empire : ... : Cornerstone Boulder
Sit start with hands on the arete. Pull onto and then balance your way up the sharp arete with the help of a crimp or two on the left wall....[more]   Browse More Classics in CA

Local Information for Cornerstone Boulder
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Cornerstone Boulder Topo
BETA PHOTO: Cornerstone Boulder Topo

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By Toddw
Jul 18, 2012
I hadn't visited this area in decades until recently. The route I was taught was not to use the arete, only the small crimps on each face while smearing, then dyno to the top and mantle out. Good times for such a small piece of granite!