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Unknown Rock

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Chosspile Chimney T 

Unknown Rock  


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Location: 39.9676, -105.2948 View Map  Incorrect?
Page Views: 303
Administrators: Ben Mottinger, Leo Paik, John McNamee, Frances Fierst, Monomaniac, Kristine Hoffman (sitewide)
Submitted By: neil chelton on May 20, 2011
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BETA PHOTO: Unknown Rock viewed from Bear Canyon.

  • Off-trail permit required MORE INFO >>>
  • Climbing areas reopened after flood MORE INFO >>>

  • Description 

    This large, obscure formation is approximately 1/2 mile west of Seal Rock and 3/4 mile south of the Sacred Cliffs. It is not listed in the current Flatirons guidebook. The approach is difficult, and the rock quality is extremely poor. But if you have a youthful spirit of adventure, want to explore something unusual, and are interested in climbing an expanding chimney, then it's definitely worth a visit.

    Getting There 

    To get there: Follow the Mesa trail to the junction with Bear Canyon. Head West into Bear Canyon for about 1/2 mile. You will have walked past Overhang Rock, Poot Ridge, and the Sanctuary formations. Unknown Rock is the next large formation on the south side of Bear Canyon. An off-trail permit and bushwhacking are required to reach the base.

    Climbing Season



    Weather station 2.4 miles from here

    1 Total Routes

    ['4 Stars',0],['3 Stars',0],['2 Stars',0],['1 Star',1],['Bomb',0]
    ['<=5.6',1],['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',0],['V2-3',0],['V4-5',0],['V6-7',0],['V8-9',0],['V10-11',0],['V12-13',0],['>=V14',0]


    Featured Route For Unknown Rock
    Chosspile Chimney follows the chimney systems clos...

    Chosspile Chimney 5.3 3+ 10 III 9 VD 3a CO : Flatirons : ... : Unknown Rock
    This adventure climb follows a series of mossy chimney systems filled with small trees and choss interspersed with terribly dangerous face climbing on brittle, exfoliating flakes covered in lichen. Upon arriving at the base (crux), you will be confronted with possibly the poorest rock quality in the whole Front Range. Make a few uncertain moves up loose, lichen-covered flakes to gain a ledge. From here, it is possible to see a mostly tree-less line of as...[more]   Browse More Classics in CO

    Comments on Unknown Rock Add Comment
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    By neil chelton
    From: Boulder, CO
    May 20, 2011
    Does anyone know the real name of this rock?