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Lost Flatiron

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Arete T,TR 
North Face Left T 
North Face Right T 

Lost Flatiron  

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Elevation: 6,900'
Location: 40.0009, -105.3929 View Map  Incorrect?
Page Views: 4,777
Administrators: Ben Mottinger, Leo Paik, John McNamee, Frances Fierst, Monomaniac, Kristine Hoffman (sitewide)
Submitted By: Michael Komarnitsky on Jan 1, 2001


57° | 44°

62° | 47°

59° | 44°

59° | 45°

62° | 46°
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BETA PHOTO: Map of BC from Cob Rock to Boulder Falls.

Seasonal Raptor Closure - Lifted MORE INFO >>>


As far as climbing is concerned, this one should stay lost! Rossiter's guide book calls it a 5.7 and two to three pitches. This is a single pitch (60m rope) 5.4 at best, mostly 5.2-3. The downclimb through the gully was more exciting! Granted, it's a beautiful slab of granite, seemingly lost in the Canyon, but does not come as advertised. I'm never one to feel badly about a climb, it beats damn near anything else, but this one bordered on a waste. The so called "crux" is one step around a tiny tree towards the top. Enjoy the many other wonderful climbs in the canyon!

There is a crag between Lost Flatiron and Witches Tower with at least 1 route on it, a 5.8 or 5.9 trad obscure line.


A. Arete, 10+ X, 1p, 160', gear?
B. Ramp?, 8 to 9+, gear.
C. North Face Left, 7, 2p, gear.
D. North Face Right, 6, 1-2p, 210', gear.

Getting There 

Drive 6.6 miles up Boulder Canyon, and park at the large pullout on the south side of the road underneath Cob Rock. It is visible from the parking lot. Cross the stream (easiest is at the east end of the pullout), and then hike about 300 yards up and right from the trail on the west side of Cob Rock. Exit from the top is via a steep gully on the west side.

Climbing Season

Weather station 4.2 miles from here

3 Total Routes

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

Featured Route For Lost Flatiron
Chris Parks follows the first lead of the South Ar...

Arete 5.10b 6a+ 19 VII- 19 E2 5b CO : Boulder Canyon : Lost Flatiron
This route is fine climbing and is very Flatiron-esque, including its setting, position, movement and protection. With some good brushing it could be made into a very nice route. At present lichen is peppered on the hand and footholds, adding spice to the inherent runouts.Rossiter's given 5.10c grade probably reflects difficulties associated with the lichens. I brushed the holds I used carefully with my fingers and hands before using them and felt that the grade is more like 5.10a. I've split ...[more]   Browse More Classics in CO

Photos of Lost Flatiron Slideshow Add Photo
The Lost Flatiron as seen from the Blob Rock appro...
The Lost Flatiron as seen from the Blob Rock appro...

Comments on Lost Flatiron Add Comment
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By Anonymous Coward
Apr 21, 2002
HHMMM... Do you think this is classic Rossiter- Blowing his own horn? 5.7? eh O.K.
By Anonymous Coward
Sep 21, 2003
I regret not having read climbingboulder's description of this area before bushwhacking my way a couple hundred yards up a 45 degree slope for an uneventful 5.4 climb. The only interesting aspects of this climb were the runouts and an excellent view of Cob Rock.
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