Green Thumb
Green Thumb in Colorado has 11 routes across 8 grades, offering mixed, sport, and trad climbing.
- 11 routes
- 5.4 – 5.12a
- Trad · Sport · Mixed
Best time to visit Green Thumb
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, 4.6 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.
Green Thumb is a climbing area on city-managed land in the Bergheim - Wood unit in Colorado, about 5 miles from the Boulder area. It sits among several named climbing areas, so it works well as one stop in a day of bouldering close to town. Summer is the most comfortable time to visit. Typical averages from a nearby weather station run highs around 73 to 79°F from June through August, with lows in the mid-40s. Winter is cold, with typical highs near 40°F and lows around 17°F. Several climbing areas lie right next door: Jaws, East Ironing Board and West Ironing Board are each about 0.1 mile away. Kohler Mesa Trail is about half a mile off for a short hike.
Routes (11)
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