Climbing Forecast › Boulder Canyon › Blob Rock

BOULDER CANYON · GRANITE · bird ban

Blob Rock weather & climbing conditions

Good — dry and climbable

Right now

Temp53°F
Wind9 mph
Gusts13 mph
Humidity54.2%
Rain 48hdry
Last rainNone recent

Assessment

No recent rain
Good friction temperature range for granite

7-day forecast

Scroll through each day — hourly detail is shown inline.

Today Saturday 10 October
Good
Temp32°F
Raindry
Wind9 mph
Gusts13 mph
Humidity54%
No recent rain
Time °F Rain Wind (mph) Gust Hum
06:00 — dry — — null%
14:00 — dry — — null%
Sun Sunday 11 October
Good
Temp66°F
Raindry
Wind6 mph
Gusts—
Humidity36%
No recent rain
  • Good conditions for granite
Time °F Rain Wind (mph) Gust Hum
06:00 51° dry 7 — 61.4%
07:00 51° dry 7 — 62.3%
08:00 53° dry 7 — 57.8%
09:00 59° dry 5 — 50.4%
10:00 63° dry 4 — 40.8%
11:00 64° dry 4 — 39%
12:00 65° dry 5 — 37.2%
13:00 68° dry 7 — 32.9%
14:00 69° dry 7 — 32.3%
15:00 69° dry 6 — 33.7%
16:00 68° dry 7 — 34.5%
17:00 68° dry 7 — 34.4%
18:00 63° dry 5 — 46%
19:00 57° dry 7 — 53.8%
20:00 57° dry 9 — 53.3%
21:00 55° dry 8 — 58.4%
Mon Monday 12 October
Good
Temp70°F
Raindry
Wind11 mph
Gusts—
Humidity23%
No recent rain
Time °F Rain Wind (mph) Gust Hum
06:00 49° dry 13 — 53.1%
07:00 49° dry 12 — 54.2%
08:00 52° dry 13 — 48.8%
09:00 59° dry 13 — 38.5%
10:00 64° dry 15 — 30.7%
11:00 67° dry 13 — 26%
12:00 70° dry 11 — 22.5%
13:00 72° dry 9 — 20.4%
14:00 72° dry 10 — 19.5%
15:00 71° dry 10 — 20%
16:00 69° dry 11 — 22.1%
17:00 66° dry 11 — 25.5%
18:00 62° dry 10 — 33.2%
19:00 58° dry 8 — 36.4%
20:00 55° dry 7 — 43.4%
21:00 55° dry 11 — 41.2%
Tue Tuesday 13 October
Poor
Temp55°F
Rain0.02 in
Wind6 mph
Gusts—
Humidity61%
0.4mm rain forecast
  • Good conditions for granite
Time °F Rain Wind (mph) Gust Hum
06:00 43° dry 4 — 82.8%
07:00 43° dry 4 — 84%
08:00 45° dry 3 — 82%
09:00 50° dry 3 — 70.6%
10:00 53° dry 4 — 65.6%
11:00 55° dry 6 — 60.5%
12:00 57° 0.01 in 6 — 57.2%
18:00 52° dry 2 — 81.8%
Wed Wednesday 14 October
Poor
Temp43°F
Rain0.1 in
Wind6 mph
Gusts—
Humidity97%
3.3mm rain forecastHumidity 97% — likely fog/cloud
Time °F Rain Wind (mph) Gust Hum
06:00 44° 0.05 in 4 — 99.2%
12:00 43° 0.03 in 6 — 97.2%
18:00 41° 0.02 in 4 — 98.7%
Thu Thursday 15 October
Poor
Temp43°F
Rain0.07 in
Wind6 mph
Gusts—
Humidity93%
1.7mm rain forecastHumidity 93% — potential fog
Time °F Rain Wind (mph) Gust Hum
06:00 35° 0.00 in 1 — 94.3%
12:00 42° 0.02 in 6 — 93.3%
18:00 42° 0.04 in 7 — 99.1%
Fri Friday 16 October
Poor
Temp43°F
Rain0.05 in
Wind3 mph
Gusts—
Humidity95%
1.2mm rain forecastHumidity 95% — potential fog
Time °F Rain Wind (mph) Gust Hum
06:00 40° 0.02 in 4 — 99.7%
12:00 42° dry 3 — 94.7%
18:00 45° dry 3 — 89%
Sat Saturday 17 October
Good
Temp63°F
Rain0.01 in
Wind2 mph
Gusts—
Humidity45%
Should be dry
  • Good conditions for granite
Time °F Rain Wind (mph) Gust Hum
06:00 37° dry 2 — 85.4%
12:00 62° dry 2 — 45.2%
18:00 53° 0.00 in 2 — 71.1%
Access
Annual raptor closures typically run February 1 – July 31 on specific routes
Bird ban (02-01 to 07-31)
USFS closes specific routes on Blob Rock for golden eagle and peregrine falcon nesting Feb 1 – Jul 31; the closure list changes annually. Check on-site signage or the Boulder Climbing Community's closures page (boulderclimbers.org) before travelling.

About Blob Rock

Blob Rock is Boulder Canyon's south-facing sport-and-trad concentration — a substantial granodiorite wall on the north side of the canyon at Mile 6.7, immediately across the creek from Cob Rock. Fifty-eight trad routes and 41 sport lines on high-friction Precambrian Boulder Creek Granodiorite. Notable overhung sport lines on the right side of the wall. South aspect and dense granite mean fast drying — climbable within hours of summer showers. for golden eagle and peregrine nesting — enforced by USFS, list changes yearly; check the Boulder Climbing Community's closures page before travelling. Shares the Boulder Canyon Middle weather cell with Cob Rock. Roadside; USFS land, no fee.

Region
Boulder Canyon
Rock type
Granite
Aspect
south-facing
Altitude
6217 ft
Exposure
medium
Seepage
low

Other crags in this region

Bell ButtressCastle Rock (Boulder Canyon)Cob RockElephant Buttresses (Boulder Canyon Mouth)The Dome (Boulder Canyon)