Colorado · Rock climbing · Boulder

Fatiron

Fatiron is a Colorado climbing crag with 5 routes on 4 difficulty grades, offering sport and trad climbing.

5 routes
5.5 – 5.10a
Trad · Sport

Best time to visit Fatiron

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, 3.5 mi away at 7,970 ft. The station sits about 800 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.

Fatiron is a climbing area on city land in Colorado, about 0.1 mile from the Maiden and Jamcrack Spire climbing areas. It sits in a cluster of bouldering and rock climbing spots, with the Shadow Canyon Trail and Shadow Canyon North Trail both about 0.3 mile away. Summer is the most comfortable time to visit. Typical averages from a nearby weather station show July highs around 79°F with lows near 50°F, while winter highs stay in the low 40s. For more time outdoors, Boulder Creek offers canoeing about 4.3 miles away, and Winiger Ridge campground is about 4.5 miles off. Sourdough Springs Campground lies roughly 8 miles away.

Keep exploring — more climbs worth the drive