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Lower Infirmary Slabs

Routes Sorted
L to R R to L Alpha
Acts of Contrition S,TR 
Look Ma No Hands TR 
Mentally Infirm T,S,TR 
Morning Oyster T,TR 
Plague Boys S,TR 
Short But Sweet T 

Lower Infirmary Slabs  

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Location: 40.18732, -105.33305 View Map  Incorrect?
Page Views: 3,928
Administrators: Ben Mottinger, Leo Paik, John McNamee, Frances Fierst, Monomaniac, Kristine Hoffman (sitewide)
Submitted By: Jim Cormier on Jul 30, 2001  with updates from J Marsella and 1 more


78° | 51°

76° | 45°
Columbus Day

66° | 44°

73° | 47°

72° | 46°
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BETA PHOTO: Overview of Lower Infirmary Slabs from the roadway...


Lower Infirmary Slabs has mainly sport routes on a south-facing slab. It is a nice location during cooler months. There are several bolted face routes. The ratings in the climbing guides are way SANDBAGGED. These routes can be top roped or sport lead.


A1. Acts of Contrition, 9+, 1p, TR or bolts.
A2. Look Ma No Hands, 5?, 1p, 30', TR.
BC. Mentally Infirm, 10-, 1p, bolts +/- gear or TR.
D. Plague Boys, 8, 1p, bolts or TR.
D. Morning Oyster, 6, 1p, gear or TR.
E. School Zone
F. Around the Corner

Above A. Short but Sweet, 9, 1p, 35', gear.

Getting There 

5.1 miles up the canyon, use pullout on the left (it is best to drive a little further and turn around at the turn off to the group of private cabins). Infirmary Slabs (Upper and Lower) are on the north side of the road. Hike up the steep trail to the right, and work your way up. Be careful of poison ivy as it is plentiful up here.

Per J Marsella: park at the mile marker 28 sign, walk downhill about 50 yards, cross the road, and follow a loose trail to the Lower Infirmary Slabs. Continue uphill around the left side of the slabs for TR access and a bit further for Short But Sweet. Be careful of poison ivy as it is plentiful both on the trail and around the belay area.

Climbing Season

For the South Fork of St. Vrain Canyon area.

Weather station 8.9 miles from here

6 Total Routes

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

Featured Route For Lower Infirmary Slabs
Plague Boys.

Plague Boys 5.7 5a 15 V+ 13 MVS 4b  CO : Lyons : ... : Lower Infirmary Slabs
This is a slab/face route. It is a definite sandbag.Per J Marsella: climb a slab to the relatively high first bolt, then angle right of the second bolt. Follow the rounded ribs to the left-leaning corner. Finish with the shared anchor bolts after a short roof move....[more]   Browse More Classics in CO

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Lower Infirmary Slabs (main section overview) from...
BETA PHOTO: Lower Infirmary Slabs (main section overview) from...

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By Anonymous Coward
Jul 29, 2001
Just uphill the first level above the lower slabs, on the left side between two big blocks is a 12' finger crack that is short but sweet. It goes at 5.9- "Short but Sweet" done 7/21 by Bill Morris and Pebby Johns. To get to the crack, simply follow the trial around the left side of the slab and scramble up and to the left and you should see it.
By Charles Danforth
From: L'ville, CO
Jul 12, 2005
Parking is on the south side of the canyon exactly at milepost 28. Ascent trail is about 100' downstream. Watch that poison ivy!
By Tim Fleming
From: Boulder, CO
Oct 16, 2006
I spent a while hiking through the rocky slops by the "cabins" looking for the Infirmary Slabs with very little to reference where I was. The so-called "ranger cabins" are these obscure, abandoned buildings hidden in some brush behind a large fenced area that is on someone's private property just off the north side of the road before the pullout at 5.1 miles. These cabins are often referred to by guidebooks and others, but beware, there are no signs or anything to tell you those are the ranger cabins. So, set the gauge on your car. The mile post 28 pullout on the south side of the road is the best reference for the Infirmary area.
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