Colorado · Rock climbing · Boulder

Thunder Road

Upper-difficulty route at Cob Rock, where trad climbing is the standard.

5.12-
grade
Sport Bolted
style

Is Thunder Road open right now?

Alert in the area

The Forest Service lists 3 alerts for Arapaho and Roosevelt National Forests.

As of · Source: USFS · Arapaho and Roosevelt National Forests. Agencies don't list every closure — check before you go.

Best time to visit Thunder Road

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.

  1. Jan

    39° / 17°

    5 wet

  2. Feb

    40° / 17°

    5 wet

  3. Mar

    47° / 22°

    6 wet

  4. Apr

    52° / 27°

    8 wet

  5. May

    61° / 35°

    10 wet

  6. Jun

    73° / 44°

    9 wet

  7. Jul

    79° / 50°

    10 wet

  8. Aug

    77° / 48°

    11 wet

  9. Sep

    70° / 41°

    8 wet

  10. Oct

    57° / 31°

    6 wet

  11. Nov

    47° / 24°

    5 wet

  12. Dec

    40° / 17°

    5 wet

Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Gross Rsvr, CO, 4.9 mi away at 7,970 ft. The station sits about 1,200 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.

Among the 27 routes catalogued at Cob Rock, this climb represents the upper end of the difficulty spectrum, where trad gear protection dominates the crag.

Keep exploring — more climbs worth the drive

Dike Wall

~0 min drive

Dike Wall in Colorado has 6 mixed climbing routes ranging across 6 difficulty grades.

Small Package Block

~0 min drive

Small Package Block in Colorado has 6 climbing routes ranging across 6 difficulty grades, offering sport and trad options.

Little Blob

~0 min drive

Little Blob in Colorado has 5 climbing routes across 4 grades, offering sport and trad options.

West Buttress aka Comedy Wall

~0 min drive

West Buttress aka Comedy Wall in Colorado has 11 routes across 9 grades, offering mixed, sport, and trad climbing.

Lower Security Risk

~1 min drive

Lower Security Risk in Colorado has 12 routes across 10 grades, offering mixed, sport, and trad climbing.

Sherwood Forest

~1 min drive

Sherwood Forest in Colorado has 12 climbing routes across 10 grades, offering sport and trad options.

Upper Security Risk

~1 min drive

Upper Security Risk in Colorado has 14 routes with sport and trad options.

Eagle Rock

~1 min drive

Eagle Rock in Colorado has 24 climbing routes with 18 difficulty grades, offering bouldering, sport, and trad.

Garden Party Wall

~1 min drive

Garden Party Wall in Colorado has 5 mixed and sport climbing routes ranging from moderate to hard difficulty.

The Riviera

~1 min drive

Riviera, The in Colorado has 21 climbing routes across 10 grades, offering mixed, sport, and trad styles.

Local businesses nearby

Outfitters and businesses near Boulder. They haven’t set up their Roamze page yet.

Boulder Rock Club

Rock Climbing business nearby (~7 mi away) — hasn't claimed their Roamze page yet

View operator

Movement Gyms

Rock Climbing business nearby (~7 mi away) — hasn't claimed their Roamze page yet

View operator

Wildcat Mountaineering

Rock Climbing business nearby (~17 mi away) — hasn't claimed their Roamze page yet

View operator