Colorado · Rock climbing · Bellvue

Grotto Bloc

Grotto Bloc in Colorado has 12 bouldering routes across 8 grades.

12 routes
V3 – V10
Bouldering

Is Grotto Bloc open right now?

Alert in the area

The Forest Service lists 4 alerts for Canyon Lakes Ranger District.

As of · Source: USFS · Canyon Lakes Ranger District. Agencies don't list every closure — check before you go.

Best time to visit Grotto Bloc

Best months: June and 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

    31° / 11°

    9 wet

  2. Feb

    33° / 10°

    9 wet

  3. Mar

    40° / 15°

    10 wet

  4. Apr

    45° / 20°

    10 wet

  5. May

    55° / 28°

    10 wet

  6. Jun

    68° / 36°

    10 wet

  7. Jul

    74° / 43°

    13 wet

  8. Aug

    72° / 41°

    14 wet

  9. Sep

    65° / 34°

    10 wet

  10. Oct

    51° / 25°

    8 wet

  11. Nov

    39° / 18°

    9 wet

  12. Dec

    31° / 11°

    9 wet

Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Hourglass Rsvr, CO, 14.4 mi away at 9,520 ft. This station doesn't record snowfall. Source: NOAA NCEI U.S. Climate Normals 1991–2020.

Grotto Bloc is a climbing area in the Rawah Wilderness, part of the Canyon Lakes Ranger District of the Arapaho and Roosevelt National Forests in Colorado. The Forest Service manages the surrounding land. Summer is the most comfortable time to climb here. Typical averages from a nearby weather station run to highs in the mid-70s in July, with lows in the low 40s. The station sits at about 9,500 feet, and temperatures in the high country tend to run cooler. Several other climbing areas sit right beside it, including Odyssey Bloc, Canals and Cronus Bloc, each about 0.1 mile away. For a hike, Camp Lake is roughly 0.3 mile off. Tunnel Campground, about 1.8 miles away, offers a place to stay.

Routes (12)