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The Slab

Routes Sorted
L to R R to L Alpha
$00pr kr33m S 
Boys with Power Toys S 
Bulges T 
Diagonal T 
Family Man S 
Film Noir S 
Hippopotamus S 
Junior Niblits 
Just Another Boy's Climb T,S 
k00kEEz and krEEm S 
Keyhole, The T 
Kr33m in the $33m TR 
Left 'N Up T 
m1n1-kr33m TR 
Nasty Boys S 
Northeast Arete T 
Pen 15 S 
Prime the Pump S 
Return of Dow, The T 
s00kr33m S 
Shalohsh S 
Sick For Sleeping S 
Sweet NiBLitz S 
Syzygy T 
Trad kr33m T 
Undertow S 
Whipping Post S 

The Slab 

Photos: Recent | Best | Popular
Elevation: 7,000'
Location: 39.9629, -105.287 View Map  Incorrect?
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The slab is the widest (broadest) chunk of stone in the Flatirons with endless possibilites for 5.3-5.6 slabmongering on its expansive, 500-foot-tall east face. It sits in a pleasant location at the mouth of Fern Canyon and offers great views to the east and south from its summit ridge.

In addition, the north and west faces are host to a handful of great sport routes in the 5.11+ to 5.12 range on steep, bomber stone. Bouldering possibilities can be found in the trees below and to the south and west of the slab.

To descend the east face routes, scramble south along the crest of The Slab until it's possible to either downclimb or execute a short rappel from a prominent notch near the terminus of the crest.

Getting There 

The most direct approach to the slab is via the North Shanahan Ridge Trail. Drive west on Table Mesa from Broadway and turn left (south) on Lehigh. Drive most of the way up the hill and turn right on Cragmoor, which dead ends after two blocks.

Park in the dead end and follow a trail west and uphill to the mesa above you. From here, continue west 20-30 minutes along the very wide North Shanahan Ridge Trail, passing a junction with the Mesa Trail en route. The Slab rears up ahead of you the further west you go; if you descend north into a gully you've just passed it!

For the east face routes cut left (south) off the main trail onto a climber's path through the ferns. To access the north and west sides, continue along the Shanahan Ridge Trail another 2 minutes (thru the gully) until you hit the Fern Canyon Trail. Follow this up and steeply west for 3-4 minutes until it makes sense to head south (left) across a talus-filled bench to reach the routes.

Climbing Season

27 Total Routes

['4 Stars',5],['3 Stars',10],['2 Stars',10],['1 Star',2],['Bomb',0]

The Classics

Mountain Project's determination of some of the classic, most popular, highest rated routes for The Slab:
Diagonal   5.2 3 8 II 8 D 2c R     Trad   
Syzygy   5.2 3 8 II 8 D 2c R     Trad   
Bulges   5.2 3 8 II 8 D 2c R     Trad, 500'   
Left 'N Up   5.2 3 8 II 8 D 2c R     Trad   
Hippopotamus   5.10d 6b+ 21 VII+ 21 E3 5b     Sport, 1 pitch, 60'   
Sick For Sleeping   5.11+ 7a 24 VIII 24 E4 6a     Sport, 1 pitch, 80'   
Just Another Boy's Climb   5.11d 7a 24 VIII 25 E5 6a     Trad, Sport, 2 pitches, 100'   
Family Man   5.12a 7a+ 25 VIII+ 25 E5 6a     Sport, 1 pitch, 90'   
Shalohsh   5.12a 7a+ 25 VIII+ 25 E5 6a     Sport, 1 pitch, 75'   
Boys with Power Toys   5.12b 7b 26 VIII+ 26 E5 6b     Sport, 1 pitch   
Undertow   5.12b 7b 26 VIII+ 26 E5 6b     Sport, 1 pitch, 80'   
Nasty Boys   5.12 7b+ 27 VIII+ 26 E6 6b     Sport, 1 pitch, 100'   
Prime the Pump   5.12c 7b+ 27 IX- 27 E6 6b     Sport, 2 pitches, 100'   
k00kEEz and krEEm   5.12+ 7c 28 IX 27 E6 6b     Sport, 1 pitch, 85'   
Film Noir   5.12c/d 7c 28 IX 28 E6 6b     Sport, 1 pitch, 95'   
$00pr kr33m   5.13- 7c+ 29 IX+ 29 E7 6c     Sport, 1 pitch, 115'   
Pen 15   5.13b 8a 29 IX+ 30 E7 6c     Sport, 2 pitches, 100'   
s00kr33m   5.13b 8a 29 IX+ 30 E7 6c     Sport, 1 pitch, 75'   
Browse More Classics in The Slab

Featured Route For The Slab
Mid-way up the route

Boys with Power Toys 5.12b 7b 26 VIII+ 26 E5 6b  CO : Flatirons : ... : The Slab
This varied line is on the north face of The Slab, right where the wall begins to bend west and climb uphill toward Undertow. It can be recognized by the double-overhanging dihedral which caps it.Intricate face climbing down low leads to ever-steepening rock and a thuggish roof. Crank the roof and move up into the corner, which may or may not be the route's crux depending on how you feel about corners. A final crank gains the anchors over the slab. This route is protected by 9 b...[more]   Browse More Classics in CO

Local Information for The Slab
Local Shops
A true mountain shop, located in the shadow of Boulder's Flatirons.
Gear that has the best chance of improving your outdoor experience.
Closeouts and cosmetic 2nds at below wholesale prices.
Aug 29 Bentgate Is Hiring: Backcountry Ski Tech 0
Aug 18 New Feature: Season Charts   4
Aug 15 Wayne Crill's Fundraiser 0
Jul 9 Access Fund is hiring in Boulder 0
Jun 11 New Women's Speed Record on the Nose   6
Jun 7 A Tribute to Jeff Lowe   4

[ Read All News ]
Upcoming Events
Sep 20Mickey Mouse Re-bolt Day
Sep 26Reel Rock 2014 - South Denver
Photos of The Slab Slideshow Add Photo
North arete of The Slab
BETA PHOTO: North arete of The Slab
Composite panorama of the Four Mile Canyon fire, 9/6/10, from the summit ridge of the Slab; just as the smoke was first becoming noticeable that morning.
Composite panorama of the Four Mile Canyon fire, 9...
The Slab is the obvious, large rock in this photo.
BETA PHOTO: The Slab is the obvious, large rock in this photo.
The west face of the Slab is steep. Note early smoke from the Four-Mile Canyon fire, 9/6/10.
The west face of the Slab is steep. Note early smo...
The Slab-ness.
The Slab-ness.
Winter conditions on The Slab.
Winter conditions on The Slab.
Comments on The Slab Add Comment
Show which comments
By adam brink
From: Boulder, CO
Jul 19, 2008

Is the new route to the right of Boys with Power Toys done yet? Any idea on difficulty and quality? It looks to be one of the best sweeps of stone up there and spanker hard. Thanks for the work!

By Pinklebear
Oct 15, 2009

The new climb (approved by the FHRC in the June cycle) right of Undertow is in now. Five bolts to double-bolt anchors (5.10+) - this is Paul Glover's climb, though he asked us to install it for him while he's in Nepal. Once he's back, I'm sure he'll add it to the database. Enjoy!

By Pinklebear
Mar 29, 2010

March 2010 new-route application through the Flatirons Climbing Council's Fixed Hardware Review Committee: flatironsclimbingcouncil.wordpress.com/category/route-applic>>>

Please click on the above link to submit comments on the proposed climb; and to have a vote in the process, come to the FHRC public meeting on April 28, 2010, at 6:30 p.m. at Movement Climbing + Fitness, Boulder, CO.

By Pinklebear
May 12, 2010

June 2010 new-route application through the Flatirons Climbing Council's Fixed Hardware Review Committee: flatironsclimbingcouncil.wordpress.com/category/route-applic>>>

Please click on the above link to submit comments on the proposed climb. The deadline closes June 15; this is the only route submitted this cycle. There will be a public meeting held June 23, Wednesday, at 7:30 p.m. at The Spot gym, Boulder.

By Pinklebear
Jun 24, 2011

Two Flatirons Climbing Council Fixed Hardware Review Committee (FHRC) applications concerning the Slab have been submitted for the June cycle.

•The first, an application to update the fixed piton on Trad Kr33m can be found here: flatironsclimbingcouncil.wordpress.com/category/route-applic>>>
Please visit the link for more info and to add any comments.

•The second is for a new 5.11, Sick for Sleeping, right of the existing climb Hippopotamus, on the Undertow ledge. More info here as well: flatironsclimbingcouncil.wordpress.com/category/route-applic>>>

The FHRC will hold its public meeting Wednesday, July 6, at 7 p.m. at The Spot gym, Boulder, Colorado, to discuss and vote on these applications and one other for the June 2011 cycle. Anyone interested is invited to come participate, comment, and cast a public vote in person.

By Pinklebear
Nov 7, 2011

Five applications have been submitted to the Fixed Hardware Review Committee (FHRC) of the Flatirons Climbing Council (FCC) for the September 2011 voting cycle:

•Two applications for new climbs, a 5.11 on the Slab and a 5.10 on Dinosaur Rock
•Two applications to add new, lower first bolts to the existing climbs Touch Monkey, a 5.11b on Der Zerkle, Dinosaur Mountain and to Short Attention Span, a 5.11d on Overhang Rock, Bear Canyon.
•One application to add an anchor to the existing climb Big Bob Cranks on Dinosaur Rock.

To view and comment on these four applications, please visit flatironsclimbingcouncil.wordpress.com/category/route-applic>>>

The vote and public meeting for this cycle will be held Tuesday, December 6 at 6:30 p.m. at The Spot gym, Boulder, Colorado. Anyone interested in voting on and discussing these applications is encouraged to attend!

By Pinklebear
Jan 2, 2012

One of the four applications submitted for the January 2012 cycle of the Flatirons Climbing Council's Fixed Hardware Review Committee is on this formation, the Slab. (The new deadline applications are January 1, April 1, and August 1). It is for a 30-meter 5.12+ called "Pogo Lord."

To see the applications and leave comments, please visit: flatironsclimbingcouncil.wordpress.com/category/route-applic>>>

It's probably best to leave comments on each individual route by sending them to us via email for now: fhrc@flatironsclimbing.org.

The public meeting and vote on these applications will be held Thursday, February 2 at 6:30 p.m. at The Spot gym, Boulder, Colorado. Anyone interested is welcome and encouraged to attend!