The Sentinel
Sentinel, The in Colorado has 8 climbing routes across 6 grades.
- 8 routes
- 5.7 – 5.10c
- Trad · Sport
Is Sentinel, The 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 The Sentinel
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, 14.3 mi away at 5,484 ft. This station doesn't record snowfall. Source: NOAA NCEI U.S. Climate Normals 1991–2020.
The Sentinel 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 spots, with Creekside Boulders, Third Band and Sweat Loaf aka Big Dogs all about 0.1 mile away. For comfortable weather, aim for late spring or early fall. Typical averages from a nearby weather station in Boulder show May highs around 71°F and September highs near 79°F, with July peaking at about 88°F. Hikers can reach Coffintop about 0.7 mile away and Button Rock Trail about 1.6 miles off. Paddlers will find North Saint Vrain Creek roughly 6 miles away.
Keep exploring — more climbs worth the drive
Creekside Boulders
~0 min drive
Creekside Boulders in Colorado has 9 bouldering routes.
Country-Western Crags
~0 min drive
Varied Colorado climbing with routes for intermediate to advanced climbers.
Sweat Loaf aka Big Dogs
~0 min drive
Sweat Loaf aka Big Dogs in Colorado has 16 climbing routes across 9 grades.
The Owl
~1 min drive
Owl is a 5-route climbing crag in Colorado with sport and trad options.
Area 51
~1 min drive
Area 51 in Colorado has 6 routes with mixed, sport, and trad climbing.
Desdemona
~1 min drive
Desdemona is a Colorado climbing crag with 5 routes across 5 grades, offering sport and trad climbing.
Lower Infirmary Slabs
~1 min drive
Lower Infirmary Slabs in Colorado has 6 routes across 4 grades with mixed, sport, and trad climbing.
Infirmary Slabs
~1 min drive
Infirmary Slabs in Colorado has 3 climbing routes with sport and trad options.
North Narrows Slabs
~1 min drive
7 routes, 6 grades, mixed, sport, and trad climbing at North Narrows Slabs in Colorado.
Trojan Bunny Buttress
~1 min drive
Trojan Bunny Buttress in Colorado has 22 climbing routes across 16 difficulty grades, offering mixed, sport, and trad styles.
