Fourth Flatiron
Fourth Flatiron in Colorado has 9 climbing routes ranging from 5.11c to 5.12a.
Photo: dirkdavidson1, CC0 (via Flickr)- 9 routes
- 5.2 – 5.11b
- Trad · Sport · Bouldering
Best time to visit Fourth Flatiron
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.
Jan
39° / 17°
5 wet
Feb
40° / 17°
5 wet
Mar
47° / 22°
6 wet
Apr
52° / 27°
8 wet
May
61° / 35°
10 wet
Jun
73° / 44°
9 wet
Jul
79° / 50°
10 wet
Aug
77° / 48°
11 wet
Sep
70° / 41°
8 wet
Oct
57° / 31°
6 wet
Nov
47° / 24°
5 wet
Dec
40° / 17°
5 wet
Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Gross Rsvr, CO, 4.4 mi away at 7,970 ft. The station sits about 700 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.
Fourth Flatiron is a climbing area on city land in the Bergheim - Wood unit of Boulder, Colorado. It sits within a cluster of other climbing spots, and the surrounding terrain is a compact network of crags and trails rather than a single route. Summer is the most comfortable time to visit. Typical averages from a nearby weather station run from highs around 73°F in June to about 79°F in July, with September easing back to around 70°F. Winters there are cold, with January highs near 39°F and lows around 17°F. Several climbing areas lie right next door, including Green Mountain Pinnacle, Tangen Towers and the Slot Machine Area, each about 0.1 mile away. The E.M. Greenman Trail and Kohler Mesa Trail are both about 0.4 mile off.
Routes (9)
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