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Routes in Fourth Flatiron

Arc de Triumph S 5.11b 6c 23 VIII- 23 E3 5c PG13
East Face, Extra Credit Summit T 5.3 3+ 10 III 9 VD 3a
East Face, North Side T 5.2 3 8 II 8 D 2c
East Face, South Side T 5.4 4a 12 IV 10 VD 3c
East Face/4th Flatiron T 5.4 4a 12 IV 10 VD 3c R
Excellent Crack T 5.6 4c 14 V 12 S 4b
Jester T 5.10d 6b+ 21 VII+ 21 E3 5b R
Lower South-East Gully T 5.4 4a 12 IV 10 VD 3c
No Balls At All V1 5

Description

The Fourth Flatiron is probably the least climbed Flatiron (and the last to be added to this site as well). It is a giant piece of rock, easily bigger than the 3rd, but it is broken up into three sections separated by south facing gullies, breaking up any clean climbing lines from base to summit. The first section begins right off the Royal Arch Trail (although this spot is not obvious, see below), and the second section sweeps up into several summits, the most northern of which is Green Mountain Pinnacle (a separate rock on this site). The third section sweeps up and merges with the SE ridge of Green Mountain.The summit of the third section is the highest of the five Flatirons, and it is also the easiest to downclimb off of.
Temporary Trail and Raptor Closures Details

Getting There

To find the base of the Fourth Flatiron, head up the Royal Arch trail to Sentinel Pass. Here the trail goes down steeply for a hundred feet or so, then levels off. Right after passing the Fourth Flatironette, the trail starts up again steeply on some switchbacks. There is a weird diagonal cave under the south face of the Fourth Flatironette that can be a useful spot in a downpour. The next rock you come up to is the Fourth Flatiron, it is only a few feet right of the trail itself. After you pass the base of the Fourth, you know you've gone too far when you cross a drainage (Tangen Spring); during wet periods there is actually a stream going down the trail here and it may be icy in the winter.

9 Total Climbs

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Classic Climbing Routes at Fourth Flatiron

Mountain Project's determination of the classic, most popular, highest rated climbing routes in this area.
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Clint Locks
Boulder
Clint Locks   Boulder
Whether larger or smaller, it's definitely a different experience than the 3rd, so worth the effort at least once. Interesting belays on the first and second pitches. Jul 2, 2009
George Bell
Boulder, CO
George Bell   Boulder, CO
I was looking up at the Flatirons today and I don't think the Fourth is any larger than the Third. It's rather subjective, of course, but the Third appears even longer than the Fourth, and also pretty wide if you count all the rock to it's left. The First is probably the largest Flatiron, due to it's width (perhaps surface area is the best measure to use?). May 9, 2002

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