Infirmary Slabs
Infirmary Slabs in Colorado has 3 climbing routes with sport and trad options.
- 3 routes
- 5.8 – 5.10d
- Trad · Sport
Is Infirmary Slabs open right now?
Alert in the area
The Forest Service lists 3 alerts for Arapaho and Roosevelt National Forests.
Fire Restrictions
Agency alert covering Arapaho and Roosevelt National Forests · USFS · Arapaho and Roosevelt National Forests
Caribou Road Closure Order
Agency alert covering Boulder Ranger District · Order 02-10-01-26-04 · USFS · Boulder Ranger District
Raptor Nesting Area Closure - Boulder Ranger District
Agency alert covering Boulder Ranger District · Order 02-10-01-26-06 · USFS · Boulder Ranger District
As of · Source: USFS · Arapaho and Roosevelt National Forests. Agencies don't list every closure — check before you go.
Best time to visit Infirmary Slabs
Best months: April–June and September–October. Best months have typical highs of 55–85 °F, lows of 30 °F or warmer (32 °F where the station doesn't record snow), at most one snowy day and no more than 12 wet days.
Jan
47° / 21°
6 wet
Feb
48° / 22°
7 wet
Mar
57° / 29°
8 wet
Apr
63° / 34°
10 wet
May
71° / 43°
12 wet
Jun
83° / 51°
10 wet
Jul
88° / 57°
11 wet
Aug
86° / 55°
10 wet
Sep
79° / 48°
8 wet
Oct
66° / 37°
7 wet
Nov
54° / 28°
6 wet
Dec
46° / 21°
6 wet
Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Boulder, CO, 14 mi away at 5,484 ft. The station sits about 600 ft lower than this place, so expect it a little cooler here. This station doesn't record snowfall. Source: NOAA NCEI U.S. Climate Normals 1991–2020.
Infirmary Slabs is a climbing area in the Boulder Ranger District of the Arapaho and Roosevelt National Forests in Colorado, about 14 miles from the city of Boulder. The site sits close to the town, and several climbing areas and hikes begin within a short distance of it. Spring and fall are the most comfortable times to visit. Typical averages from a nearby weather station in Boulder put May highs around 71°F and October highs around 66°F, with July peaking near 88°F and January lows around 21°F. The Upper Infirmary Slabs and Lower Infirmary Slabs are both about 0.1 mile away, and the Spire is a similar distance off. Button Rock Trail lies about 2 miles away.
Routes (3)
Left Infirmary Slab(3)
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