North Narrows Slabs
7 routes, 6 grades, mixed, sport, and trad climbing at North Narrows Slabs in Colorado.
- 7 routes
- 5.9 – 5.12a/b
- Trad · Sport · Mixed
Is North Narrows 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 North Narrows 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, 13.9 mi away at 5,484 ft. This station doesn't record snowfall. Source: NOAA NCEI U.S. Climate Normals 1991–2020.
North Narrows Slabs is a climbing area in the Boulder Ranger District of the Arapaho and Roosevelt National Forests in Colorado, managed by the Forest Service. It sits among several other climbing destinations and trails within a short distance, making it an easy addition to a day spent exploring the Boulder area. The most comfortable months for a visit are typically September and May, when typical averages from the nearby Boulder weather station run from highs around 71°F with lows near 43°F in May to about 79°F and 48°F in September. July is the warmest month, averaging highs near 88°F. Spire, The, Pantheon, The and Hideaway Dome all lie about 0.1 mile away, and Coffintop is a hike at the same distance. Button Rock Trail is about 2.1 miles off.
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