Main Boulder, Hummingbird Boulders
Main Boulder, Colorado has 10 climbing routes across 8 difficulty grades.
- 10 routes
- 5.10- – 5.10d
- Sport · Bouldering · Trad
Is Main Boulder, Hummingbird Boulders open right now?
Closure in the area
There's a closure order in White River National Forest. It doesn't name Main Boulder, Hummingbird Boulders, so check the source for the area it covers (2 listed).
Green Mountain Reservoir and Ruedi boat ramps closed for the season
Agency closure covering White River National Forest · USFS · White River National Forest
Eagle-Thomasville (400), Burnt Mtn (506), plus NFSR 414 and 416 openings delayed to June 16
Agency closure covering White River National Forest · USFS · White River National Forest
FSR 314, Crystal River Road, open but be prepared for delays
Agency alert covering White River National Forest · USFS · White River National Forest
FSR 286, Radical Hill, is closed due to washouts and unsafe conditions
Agency alert covering White River National Forest · USFS · White River National Forest
White River National Forest lifting fire restrictions on Friday Sept. 25
Agency alert covering White River National Forest · Order 2026 · USFS · White River National Forest
As of · Source: USFS · White River National Forest. Agencies don't list every closure — check before you go.
Best time to visit Main Boulder, Hummingbird Boulders
Best months: June–July. 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
31° / 1°
12 wet
Feb
33° / 4°
11 wet
Mar
41° / 10°
11 wet
Apr
47° / 18°
11 wet
May
58° / 26°
10 wet
Jun
69° / 33°
9 wet
Jul
75° / 38°
12 wet
Aug
73° / 37°
13 wet
Sep
66° / 30°
10 wet
Oct
54° / 21°
8 wet
Nov
41° / 11°
9 wet
Dec
32° / 3°
11 wet
Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Dillon 1 E, CO, 6.4 mi away at 9,065 ft. The station sits about 700 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.
Main Boulder is a bouldering spot within the Hummingbird Boulders climbing area in the Dillon Ranger District of White River National Forest in Colorado. The Forest Service manages the land. Summer is the most comfortable time to visit. Typical averages from a nearby weather station at Dillon run to highs around 75°F in July and 66°F in September, with temperatures at the boulders running a little cooler than that station's figures. Seam Boulder and the rest of the Hummingbird Boulders sit about 0.1 mile away. Settlers' Creek Nature Trail is about 0.6 mile off, and the Snake River offers canoeing about 1.1 mile away.
Routes (10)
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