Colorado · Rock climbing · Monument

Main Boulder

Main Boulder in Colorado has 8 bouldering routes across 6 grades.

Main BoulderPhoto: bgautrea, CC BY-SA 2.0 (via Flickr)
8 routes
V1 – V5
Bouldering

Is Main Boulder open right now?

Alert in the area

The Forest Service lists 11 alerts for Pike and San Isabel National Forests.

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

Best time to visit Main Boulder

Best months: May–July and September–October. 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

    41° / 16°

    6 wet

  2. Feb

    43° / 18°

    6 wet

  3. Mar

    50° / 23°

    9 wet

  4. Apr

    57° / 29°

    9 wet

  5. May

    68° / 39°

    10 wet

  6. Jun

    79° / 47°

    11 wet

  7. Jul

    83° / 54°

    12 wet

  8. Aug

    80° / 52°

    13 wet

  9. Sep

    72° / 43°

    8 wet

  10. Oct

    60° / 33°

    6 wet

  11. Nov

    48° / 22°

    8 wet

  12. Dec

    41° / 17°

    7 wet

Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Monument, CO, 3.2 mi away at 7,080 ft. The station sits about 600 ft lower than this place, so expect it a little cooler here. This station doesn't record snowfall. Source: NOAA NCEI U.S. Climate Normals 1991–2020.

Main Boulder is a climbing area in the Pikes Peak Ranger District of the Pike and San Isabel National Forests in Colorado, managed by the Forest Service. It sits among a cluster of named boulders, with Highball Boulder and Skull Crusher Boulder each about 0.1 mile away, so the area works well as a destination for a single climb or a short loop between boulders. Late spring and early fall tend to be the most comfortable times to visit. Typical averages from the nearby Monument, Colorado weather station show September highs around 72°F with lows near 43°F, while May runs a bit cooler at about 68°F by day. That station sits a few hundred feet lower than the boulders, so temperatures on the rock itself run a little cooler. Within about a mile are the I-A Fitness hike and the Raspberry Mountain Trail. Tent City campground lies about 4.3 miles away, and Monument Creek, roughly 5.8 miles off, offers paddling.

Routes (8)