Blob Slab
Blob Slab in Colorado has 9 routes across 7 grades, offering mixed, sport, and trad climbing.
- 9 routes
- 5.6 – 5.11c
- Mixed · Trad · Sport
Is Blob Slab 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 Blob Slab
Best months: May–September. 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
39° / 17°
5 wet
Feb
40° / 17°
5 wet
Mar
47° / 22°
6 wet
Apr
52° / 27°
8 wet
May
61° / 35°
10 wet
Jun
73° / 44°
9 wet
Jul
79° / 50°
10 wet
Aug
77° / 48°
11 wet
Sep
70° / 41°
8 wet
Oct
57° / 31°
6 wet
Nov
47° / 24°
5 wet
Dec
40° / 17°
5 wet
Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Gross Rsvr, CO, 5 mi away at 7,970 ft. The station sits about 900 ft higher than this place, so expect it a little warmer here. This station doesn't record snowfall. Source: NOAA NCEI U.S. Climate Normals 1991–2020.
Blob Slab 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 a cluster of climbing spots, with Blob Rock and Upper East Face each about 0.1 mile away. The area has nine routes, with grades ranging from 5.6 to 5.11c. The styles include mixed, sport and trad climbing, and the hardest route is A Hike for Y2K, a sport climb at 5.11c. Crack Tack is a sport route at 5.10a, and Why Two Kracks? is a trad route at 5.6. Summer is the most comfortable time to climb. Typical averages from a nearby weather station show July highs around 79°F with lows near 50°F, while winter highs stay in the low 40s. Nearby, the Hawkins Surguine Spur Trail is about 1.7 miles away and Meyer's Homestead Trail is about 1.9 miles away. Winiger Ridge campground is about 3.8 miles away, and Boulder Creek is about 4.1 miles away.
Routes (9)
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