REI Community
Mosaic Rock
Routes Sorted
L to R R to L Alpha
Baby Cakes T 
Better Red Than Dead T 
Bienvenidos T 
Black Streak T 
Chicken Heads T 
Chicken Shit T 
Clean Green Dream T 
Cryin' in the Rain T 
Dirty Black Nightmare T 
Dirty Diagonal T 
Dung Alley T 
Fine Little Line S 
Five Years After T 
Fried Chickens T 
Holthouse to Hell T 
Jug or Not S 
Mama Jugs T 
Ocho Diamentes (Tech-No-Star) S 
Rite of Summer Dreams T 
Seaman Girl T 
Serpent Face T 
Serpentine Crack T 
Summer Dreams T 
Suprise-Suprise T 
Techtonics T,S 
Techweenie S 
Threshold S 
To Bolt on Lead or Not to Bolt (TBOL) T 
Unknown (Left of Baby Cakes) T,S 
Unknown (Right of Mama Jugs) T,S 
Walking Dread T 

Dirty Diagonal 

YDS: 5.6 French: 4c Ewbanks: 14 UIAA: V ZA: 12 British: S 4b

Type:  Trad, 2 pitches, 150'
Original:  YDS: 5.7 French: 5a Ewbanks: 15 UIAA: V+ ZA: 13 British: MVS 4b [details]
FA: ?
Page Views: 2,899
Submitted By: George Perkins on Sep 23, 2007

You & This Route  |  Other Opinions (34)
Your todo list:
Your stars:
Your rating: -none- [change]
Your ticklist: [add new tick]
Your opinion of this PAGE:    [0 people like this page.]
Kristen Samet on DD Photo courtesy of andrewburr....

Some rocks in this area are on private property. Property owner requests signed waiver. MORE INFO >>>


A great beginner climb! This good 5.7 route isn't dirty as the name would imply. Probably the easiest route on Mosaic Rock.

Scramble up 3rd class slabs to the base of the biggest right angling crack on the south face of Mosaic Rock. Staying right of the crack on knobs and positive edges is easier than the wide crack itself. You can find pro in cracks between the flakes. [Currently there is a 2-bolt anchor at the end of the most interesting climbing, but it seems to come and go, so make sure it's there before relying on it to lower off.] For a more fun experience, continue up to the Mosaic Rock summit from here by following low angle cracks and ledges (5.2). If you summit, scramble off the east side of the formation (some 3rd class).


This climb follows the big fat right-angling crack just right of the Mosaic Face, left of the Chicken Heads wall.


Nuts & cams to 3", optional larger cam

Photos of Dirty Diagonal Slideshow Add Photo
Rock Climbing Photo: An unknown climber on Dirty Diagonal. She must hav...
An unknown climber on Dirty Diagonal. She must hav...
Rock Climbing Photo: Dirty Diagonal in perspective
BETA PHOTO: Dirty Diagonal in perspective
Rock Climbing Photo: Jim Olsen on Dirty Diagonal
BETA PHOTO: Jim Olsen on Dirty Diagonal

Comments on Dirty Diagonal Add Comment
Show which comments
By Bill Lawry
From: New Mexico
Jun 24, 2013
rating: 5.6 4c 14 V 12 S 4b

I think this is a great climb. Don't let the word "Dirty" in the name dissuade you from giving it a go!
By Mathias
From: Loveland, CO
May 24, 2015

I made the mistake of building an anchor and belaying at a ledge 10-15' below the summit instead of going all the way up. You can't walk off from that ledge. The walk off is quite obvious, but you have to summit first.

Mountain Project

The Definitive Climbing Resource

MTB Project

Next Generation MTB Trail Maps

Powder Project

Backcountry Ski Maps & Secret Stashes
FREE Stickers · Gyms · RSS · School of Rock · Contact · About