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The Sibling

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Chockstone Roof T 
Direct North Face T 
Northwest Arete T,TR 

The Sibling  


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Location: 39.9439, -105.2899 View Map  Incorrect?
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Administrators: Ben Mottinger, Leo Paik, John McNamee, Frances Fierst, Monomaniac, Kristine Hoffman (sitewide)
Submitted By: Tony B on Nov 8, 2004
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BETA PHOTO: The "Sibling" formation, a small flatiron due Nort...

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  • Description 

    The Sibling is a small peak which lies almost due North of the Matron, perhaps 400-500 meters. It's large East Face can be seen from the Mesa Trail and from the South, one can view the sizable SOuth Face. Both the East and South Faces are broken and low angle for the bottom 2/3 of the rock, but increase in height, steepness and angle as one goes Westward, uphill. The North Face is quite large and will support perhaps a dozen lines if 'climbed out' but these are shorter lines.

    Presently, there appear to be no previously established lines, and 3 new lines have been climbed. These are on the West and North faces of the rock. None are classics, but if cleaned, the Direct North Face would be a very good line. At present it is still dirty on it's lower half, although the upper 'clean' half can be traveresed into without much fuss, and is VERY good.

    This rock is the triangle-shaped rock with the solid upper 1/3 seen in rossiter's Flatirons book, Almost Due North of the summit of the Matron, on Pages 12, 14 and 20.

    Getting There 

    To approach, reach the Matron's West Face, and strike out almost Due North to access a narrow hiking approach just below the "Lost And Found" Flatiron and the West Tip of the rock. You should arrive at the West End where the Routes NW Arete (5.8) and Chockstone Roof (5.7) both start. The North Face can be reached by going down NE from here, or presumably from the Shadow Canyon Trail. The South Face is guarded by dirty slabs to the South and is difficult to get to.

    Climbing Season


    3 Total Routes

    ['4 Stars',0],['3 Stars',0],['2 Stars',0],['1 Star',3],['Bomb',0]
    ['<=5.6',0],['5.7',1],['5.8',1],['5.9',0],['5.10',1],['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 The Sibling
    Chris Parks follows up the F.A. of the 'N.W. Arete (5.8)' of he Sibling formation, a diminutive flatiron in North of the Matron. Photo by Tony Bubb.

    Northwest Arete 5.8 5b 16 VI- 15 HVS 4c CO : Flatirons : ... : The Sibling
    This Route is on the W/SW face of the Sibling, essentially on what would be considered it's back side. The best approach to this is either up to the North side and then up around to the West, or going West until parallel with the top of the rock and slightly above, then dropping down into the West face from the South.This climb ascends the acute arete on the Northwest Corner. The climbing is relatively steep and thin in places, with a crux 1/3 of the way up. The pro is adequate, but adequate onl...[more]   Browse More Classics in CO

    Local Information for The Sibling
    Photos of The Sibling Slideshow Add Photo
    The Sibling, a reasonably-sized Flatiron in its own right, is the second tower in this photo, sitting just right (North) of the larger feature, the Matron. This is as seen from high on Jamcrack Spire, across Shadow Canyon.
    The Sibling, a reasonably-sized Flatiron in its ow...

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