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The Cornerstone

Routes Sorted
L to R R to L Alpha
Assault of the Earth 
Forgiven, The 
Good Book, The 
Mustard Seed, The 
Repo Man 
Victory in de Feet 

The Cornerstone 

Photos: Recent | Best | Popular
Elevation: 7,400'
Lat, Long: 40.0025, -105.4143 Map Incorrect?
Page Views: 5,533
Administrators: Ben Mottinger, Leo Paik, John McNamee, Frances Fierst, Monomaniac, Kristine Hoffman
Submitted By: Barry Gereb on Jan 1, 2001
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  Print a Mini-Guide with routes

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BETA PHOTO: The climbing's actually alright, but, still....
Flood damaged road reopens MORE INFO >>>


This is a small crag with ~6 routes that has been the site of some less-than-pleasant bolting controversies. Nonetheless, there is some decent climbing here.


A. The Forgiven, 10-, 1p, 50', bolts.
B. Repo Man, 12-, 1p, 50', bolts.
C. Victory In De Feet, 11, 1p, 50', bolts.
D. The Good Book, 10, 1p, 50', bolts.
E. Assault Of The Earth, 11-, 50', bolts.
F. The Mustard Seed, 8, 50', bolts or gear.

Getting There 

Park as for Practice Rock and hike 100 feet up the road to a faint trail. Look for an old stone foundation wall and angle up and right to a large ledge below the Cornerstone cliff (5 minutes). One can also approach from the Bowling Alley by following the trail that angles uphill and north/west along the Tungsten Mine Shaft Cliff, angle downhill towards a gully and scramble up onto the ledge below the Cornerstone cliff (10 minutes).

6 Total Routes

['4 Stars',0],['3 Stars',0],['2 Stars',3],['1 Star',3],['Bomb',0]

The Classics

Mountain Project's determination of some of the classic, most popular, highest rated routes for The Cornerstone:
The Good Book   5.10c 6b 20 VII E2 5b     Sport, TR, 1 pitch   
Browse More Classics in The Cornerstone

Featured Route For The Cornerstone
Assault of the Earth and The Good Book, the second and third routes from the right on The Cornerstone.

Assault of the Earth 5.11a 6c 22 VII+ E3 5c  CO : Boulder Canyon : The Cornerstone
The second climb from the right on Cornerstone -- Ascend the arete that forms the left side of the Mustard Seed dihederal, trying to stay off The Good Book. An 11a move or two over a tiny roof leads to balancy 5.10 above. Thoroughly bolted....[more]   Browse More Classics in CO

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May 14, 2002

Great area to tick off several routes in a couple of hours if its not too busy.

By Dan Green
Jun 3, 2002

Actually, I'm not Dan but his cool chick, Jenelle. Many thanks to whoever repaired the chopped hangers at The Cornerstone. It's really a fine solid rock with 6 good routes for their grades. All can be done in a short period of time, even on your lunch break. The only slip in June - Aug. is that it is extremely hot. I recommend after 5pm or early morning. This is excellent choice for winter climbing and great for a mixed party of beginner and advanced climbers.

By Jake Wyatt
From: Longmont, CO
Jan 17, 2004

The routes here are fun enough, but at times it's tough to know exactly where the intended climbing lines are in relation to the bolts. It's very easy to find yourself wondering if you're using a hold that's "supposed to be" for a neighboring route. Still, a decent place to go to get a little climbing in.

By John Kearney
From: Boulder, CO
May 24, 2010

Hey, so I think I lost my phone up here. If anyone picks it up and gets a hold of me, that would be awesome!

By Frosty Weller
From: Colorado
Jul 11, 2011

There were probably 4 okay routes here, unfortunately the squeezing of lines on this tiny crag kind of left me with a bad taste in my mouth... see Beta Photo.