ASPEN IN THE CENTRAL ROCKY MOUNTAIN REGION 
Table 4. — Rainfall in the aspen zone in inches 
11 
Station 
i 
Jan. 
Feb. 
Mar. 
Apr. 
May 
June 
July 
Aug. 
Sept. 
Oct. 
Nov. 
Dec. 
An- 
nual 
Colorado: 
Cheeseman 
0.21 
0.64 
0.80 
1.85 
1.89 
1.58 
3.34 
2.37 
1.56 
1.05 
0.51 
0.78 
16.58 
Estes Park. ... 
.56 
.74 
1.20 
2.30 
2.84 
1.19 
3.28 
1.69 
1.74 
1.53 
.96 
.56 
18.59 
.50 
.79 
.84 
.98 
1.12 
1.78 
2.96 
3.29 
1.98 
2.72 
2.95 
2.43 
3.87 
4.49 
3.27 
3.58 
1.45 
1.49 
1.11 
1.72 
.42 
.76 
.99 
.85 
21.46 
Lake Moraine... 
24.88 
Silverton 
3.13 
2.11 
2.68 
1.61 
.96 
1.47 
2.96 
3.20 
3.00 
3.12 
1.33 
2.15 
27.72 
Telluride 
2.11 
1.55 
1.93 
2.48 
2.52 
1.09 
2.84 
2.77 
1.40 
2.02 
1.48 
.86 
23.05 
Wagon Wheel 
Gap 
1.22 
1.35 
1.17 
1.00 
1.37 
1.24 
1.55 
1.25 
1.04 
2.10 
1.26 
1.40 
3.51 
1.00 
2.10 
.92 
1.63 
1.26 
1.77 
1.52 
1.32 
1.09 
1.28 
1.18 
19.22 
Idaho: Irwin 
15.31 
Utah: 
East Portal, 
Strawberry 
Tunnel 
2.47 
2.25 
2.46 
1.53 
1.39 
1.02 
1.72 
1.20 
1.92 
2.45 
1.37 
1.59 
21.37 
Huntsville 
2.98 
2.53 
2.54 
1. 69 
2.12 
.72 
.62 
.87 
1.04 
1.70 
2.03 
1.88 
20.72 
Soldier Summit.. 
1.29 
1.68 
1.70 
.68 
.86 
.26 
.64 
.79 
1.01 
.64 
1.15 
1.51 
12.21 
West Portal, 
Strawberry 
Tunnel 
4.13 
3.59 
2.42 
1.83 
1.44 
1.36 
1.71 
1.56 
2.68 
1.93 
2.68 
2.70 
28.03 
Winter Quarters. 
2.96 
1.85 
1.41 
1.69 
1.40 
1.29 
1.90 
2.05 
1.67 
1.67 
1.35 
1.39 
20.63 
Marion 
2.28 
1.81 
2.66 
1.72 
2.21 
1.06 
.74 
1.63 
1.54 
1.26 
1.61 
1.75 
20.27 
Wyoming: 
1.41 
2.10 
1.49 
1.40 
1.74 
1.27 
1.39 
1.70 
2.43 
2.66 
1.43 
2.19 
1.05 
1.42 
1.08 
1.02 
1.41 
1.80 
1.40 
1.90 
.76 
1.70 
1.28 
1.50 
16.87 
Alta 
20.66 
Table 5. — Location of meteorological stations in the aspen type 
Station 
Eleva- 
tion 
Location 
Colorado: 
Cheeseman 
Estes Park Fish Hatchery... 
Fremont Experiment Station 
Lake Moraine 
Silverton 
Telluride. 
Wagon Wheel Gap 
Idaho: Irwin 
Utah: 
Great Basin Experiment Sta- 
tion. 
Huntsville 
Marion 
Soldier Summit.. 
Strawberry Tunnel- 
East Portal 
West Portal 
Winter Quarters 
Wyoming: 
Afton 
Alta 
Feet 
6,890 
8,000 
8,850 
10, 265 
9,400 
8,756 
9,610 
5,200 
8,700 
5,100 
6,400 
7,454 
7,606 
7,650 
7,625 
6,250 
500 
Near lower limits of aspen type. 
Near the aspen type. 
Located in potential aspen type, small patches within short 
distance of station. 
In spruce-fir type where aspen of poor quality occupies 
burned-over areas. 
Near the aspen type. 
Located in aspen type. 
Located in aspen type. 
Nearly at the elevation of the lower edge of the aspen type; 
poor quality. 
Located in a clearing in the middle of the aspen type. Site 
quality 2. 
Aspen descends to elevations approximately equal to Hunts- 
ville on north slopes near town. It is of very poor develop- 
ment. 
Aspen extends down streams almost to the elevation of 
Marion, and is found on a north slope at Peoa a few miles 
north at about the same elevation; quality poor. 
In bru.=h type. Aspen of poor quality extends down draws to 
elevations much lower than this station, and generally 
covers north slopes near by. 
In the aspen type. 
Virtually in the aspen type, of varying quality on different 
slopes and exposures, average is good. 
The aspen type descends to the level of the station and lower 
in nearby mountains. 
In the lower aspen type of about site quality 3 to 4. 
A number of cooperative observers' stations of the United States 
Weather Bureau are located either in the aspen type or near its 
edge in Colorado, Idaho, and Utah. Meteorological records from 
several of the most typical stations as given above are shown in 
Tables 3 and 4, and indicate the type of climate in which aspen 
grows in the central Kocky Mountain region. 
