Climbing Forecast › Boulder Canyon › Castle Rock (Boulder Canyon)

BOULDER CANYON · GRANITE

Castle Rock (Boulder Canyon) climbing conditions

Poor — wet, too windy or closed

Right now

Temp68°F
Wind9 mph
Gusts13 mph
Humidity39.2%
Rain 48hdry
Last rainNone recent

Assessment

3.2mm rain forecast

7-day forecast

Scroll through each day — hourly detail is shown inline.

Today Monday 24 August
Poor
Temp70°F
Rain0.1 in
Wind8 mph
Gusts13 mph
Humidity36%
3.2mm rain forecast
Time °F Rain Wind (mph) Gust Hum
15:00 68° dry 9 — 39.2%
16:00 72° dry 7 — 33.1%
17:00 75° dry 6 — 28.9%
18:00 76° 0.01 in 7 — 27.6%
19:00 76° 0.00 in 8 — 28.7%
20:00 77° 0.01 in 8 — 27.2%
21:00 74° 0.09 in 9 — 37.4%
Tue Tuesday 25 August
Poor
Temp57°F
Rain0.2 in
Wind6 mph
Gusts—
Humidity65%
6.1mm rain forecast
  • Good conditions for granite
Time °F Rain Wind (mph) Gust Hum
06:00 56° dry 8 — 67.1%
07:00 53° dry 7 — 74.7%
08:00 53° dry 6 — 76.9%
09:00 52° dry 6 — 78.1%
10:00 51° dry 6 — 79.8%
11:00 50° dry 6 — 81.1%
12:00 50° dry 5 — 80.7%
13:00 53° dry 6 — 75.9%
14:00 63° dry 5 — 60.7%
15:00 68° dry 5 — 41.2%
16:00 71° 0.02 in 7 — 36.9%
17:00 70° 0.01 in 6 — 39%
18:00 73° 0.02 in 7 — 33.9%
19:00 75° 0.1 in 9 — 33.4%
20:00 64° 0.03 in 10 — 67.7%
21:00 69° 0.01 in 5 — 48%
Wed Wednesday 26 August
Poor
Temp57°F
Rain0.1 in
Wind4 mph
Gusts—
Humidity63%
3.4mm rain forecast
  • Good conditions for granite
Time °F Rain Wind (mph) Gust Hum
06:00 52° dry 8 — 92.8%
07:00 52° dry 9 — 89.9%
08:00 51° dry 7 — 89.5%
09:00 51° dry 6 — 87.1%
10:00 51° dry 4 — 76.8%
11:00 51° dry 4 — 74.3%
12:00 51° dry 4 — 73.1%
13:00 52° dry 4 — 70.8%
14:00 62° dry 4 — 64.6%
15:00 68° dry 3 — 40.9%
16:00 70° dry 5 — 38.7%
17:00 70° 0.01 in 5 — 43.5%
18:00 69° 0.01 in 6 — 43.7%
19:00 67° 0.00 in 6 — 49.4%
20:00 67° 0.05 in 5 — 47.8%
21:00 63° 0.04 in 6 — 70.2%
Thu Thursday 27 August
Poor
Temp48°F
Rain0.03 in
Wind4 mph
Gusts—
Humidity84%
0.8mm rain forecast
Time °F Rain Wind (mph) Gust Hum
06:00 52° dry 5 — 92.6%
12:00 49° dry 4 — 83.8%
18:00 73° 0.02 in 3 — 34.4%
Fri Friday 28 August
Poor
Temp52°F
Rain0.02 in
Wind7 mph
Gusts—
Humidity71%
0.4mm rain forecast
  • Good conditions for granite
Time °F Rain Wind (mph) Gust Hum
06:00 55° dry 6 — 74.5%
12:00 52° dry 8 — 70.8%
18:00 77° 0.01 in 4 — 25.8%
Sat Saturday 29 August
Poor
Temp55°F
Rain0.01 in
Wind6 mph
Gusts—
Humidity54%
0.3mm rain forecast
  • Good conditions for granite
Time °F Rain Wind (mph) Gust Hum
06:00 58° dry 6 — 56.3%
12:00 55° dry 6 — 53.5%
18:00 78° 0.01 in 13 — 23.3%
Sun Sunday 30 August
Good
Temp55°F
Rain0.00 in
Wind9 mph
Gusts—
Humidity63%
Should be dry
  • Good conditions for granite
Time °F Rain Wind (mph) Gust Hum
06:00 58° dry 6 — 59%
12:00 56° dry 9 — 63.4%
18:00 74° dry 11 — 29.1%
Mon Monday 31 August
Poor
Temp55°F
Rain0.05 in
Wind1 mph
Gusts—
Humidity62%
1.3mm rain forecast
  • Good conditions for granite
Time °F Rain Wind (mph) Gust Hum
06:00 57° dry 7 — 58.3%
12:00 55° 0.01 in 1 — 61.6%
18:00 63° 0.05 in 6 — 64.6%

About Castle Rock (Boulder Canyon)

Castle Rock is Boulder Canyon's iconic upper-canyon test-piece formation — a soaring Boulder Creek Granodiorite tower on the south side of the canyon at Mile 12, sitting at 2,133m altitude (the highest cragging in Boulder Canyon and noticeably cooler than the mouth). Ninety-one total routes, weighted toward the classic hard trad end of the spectrum. The marquee is Country Club Crack (5.11c), one of Boulder Canyon's most-photographed lines and a Front Range trad benchmark. Athlete's Feat (5.11a) and Never A Dull Moment (5.11b) round out the hard classics; Cussin' Crack (5.7) and Jackson's Wall (5.6) provide moderate options for less-experienced parties on a warm day. North aspect and high altitude combine to make Castle Rock a summer refuge — routinely 5–10°C cooler than the canyon mouth, and often climbable when Denver is in the mid-30s. Own weather anchor (upper canyon is a genuinely distinct microclimate from the mid- and lower-canyon crags). Roadside pull-off on CO-119; USFS land, no fee.

Region
Boulder Canyon
Rock type
Granite
Aspect
north-facing
Altitude
6998 ft
Exposure
high
Seepage
low

Other crags in this region

Bell ButtressBlob RockCob RockElephant Buttresses (Boulder Canyon Mouth)The Dome (Boulder Canyon)