Main Flatirons
Main Flatirons in Colorado has 8 bouldering routes across 7 grades.
- 8 routes
- V1 – V6+
- Bouldering
Best time to visit Main Flatirons
Best months: May–June and August–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
37° / 11°
5 wet
Feb
41° / 15°
4 wet
Mar
51° / 23°
5 wet
Apr
60° / 28°
5 wet
May
70° / 35°
5 wet
Jun
82° / 42°
3 wet
Jul
87° / 51°
5 wet
Aug
84° / 50°
6 wet
Sep
76° / 41°
5 wet
Oct
63° / 30°
4 wet
Nov
49° / 20°
4 wet
Dec
37° / 12°
4 wet
Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Northdale, CO, 21.1 mi away at 6,681 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.
Main Flatirons is a climbing area on Bureau of Land Management land within the Tres Rios Field Office in Colorado. The nearest town is Boulder, about 20 miles away. Spring and fall are the most comfortable times to visit. Typical averages from the Northdale weather station, about 21 miles away, show May highs near 70°F and September highs near 76°F, while July averages climb to about 87°F and winter highs sit in the upper 30s. Several other climbing areas lie within a few miles. 16Z is about 3.5 miles away, and Hamm Canyon and Slickrock Buttress are each about 3.8 miles off. Black Wall is roughly 7.6 miles away.
Keep exploring — more climbs worth the drive
Photo: SymphonicPoet, CC BY 2.0 (via Flickr)County Line Boulders
~54 min drive
County Line Boulders in Colorado has 5 bouldering routes across 3 grades.
Photo: Ben B, CC BY-SA 4.0 (via Wikimedia Commons)Joe Wilson Canyon
~1h 1m drive
Joe Wilson Canyon in Utah has 6 trad routes spanning 3 difficulty grades.
Photo: SymphonicPoet, CC BY 2.0 (via Flickr)Sewemup Mesa
~1h 7m drive
Sewemup Mesa in Colorado has 14 traditional climbing routes across 8 difficulty grades.
Photo: Kent G. Budge, CC0 (via Wikimedia Commons)Blue Gramma Cliff
~1h 12m drive
Blue Gramma Cliff in Utah has 21 climbing routes across 11 grades, offering mixed and traditional climbing.
Photo: Kent G. Budge, CC0 (via Wikimedia Commons)3D
~1h 12m drive
3D is a Utah climbing crag with 8 routes across 6 grades.
Photo: Ken Lund, CC BY-SA 2.0 (via Flickr)Sunvana Wall
~1h 12m drive
Sunvana Wall in Utah offers 6 mixed and sport climbing routes across 4 difficulty grades.
Disappointment Valley Bouldering
~6 min drive
Desert bouldering in Colorado's Disappointment Valley with varied problems and scenic views.
Towers above The BLM Campground
~14 min drive
8-route climbing area in Colorado with sport and trad options.
Wall of The Ancients
~26 min drive
Wall of The Ancients in Colorado has 5 sport climbing routes.
Open Range
~26 min drive
Open Range in Colorado offers 6 sport climbing routes across 4 difficulty grades.
