Colorado · Rock climbing · Jefferson

Cro Magnon

Cro Magnon in Colorado has 12 climbing routes across 10 grades, offering bouldering and sport styles.

12 routes
V1-2 – V11+
Bouldering · Sport

Is Cro Magnon open right now?

Alert in the area

The Forest Service lists 8 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 Cro Magnon

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

    34° / 9°

    7 wet

  2. Feb

    36° / 9°

    7 wet

  3. Mar

    43° / 16°

    8 wet

  4. Apr

    49° / 22°

    9 wet

  5. May

    59° / 30°

    10 wet

  6. Jun

    70° / 38°

    9 wet

  7. Jul

    75° / 43°

    14 wet

  8. Aug

    72° / 42°

    15 wet

  9. Sep

    66° / 35°

    9 wet

  10. Oct

    54° / 25°

    6 wet

  11. Nov

    42° / 16°

    6 wet

  12. Dec

    33° / 9°

    7 wet

Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Grant, CO, 11.6 mi away at 8,675 ft. The station sits about 900 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.

Cro Magnon is a climbing area in Colorado's Pike and San Isabel National Forests, within the South Park Ranger District. The Forest Service manages the land, and the area sits among several other climbing spots, with Hot Stepper Boulder and Blockage Boulder each about 0.1 mile away. The climbing here is mostly bouldering, with 10 boulder routes and two sport routes among the 12 listed. The boulders range from V1-2 to V11+, with the hardest route named Project V11+?... and the sport routes rated around 5.12a/b. The boulders are the main draw, and the area works well as a base for a day of climbing close to the trailheads and campgrounds of the South Park district. Summer is the most comfortable time to visit. Typical averages from a nearby weather station in Grant, CO, run to highs around 75°F in July, with lows in the low 40s. That station sits about 900 feet lower than the area, so temperatures at Cro Magnon run cooler. Winter is cold, with January highs around 34°F and lows near 9°F. Nearby, Teepee Trail is about 2 miles away and Nate Stultz about 2.9 miles. Tarryall Creek, a paddling spot, is about 4 miles off, and Lost Park Campground is roughly 8 miles away.

Routes (12)