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Little Colorado HMA

Administered by:   Rock Springs Field Office
Location:   west of Farson , WY
Acres:   over 632,000
Elevation:   6,300 ft. - 7,900 ft.
AML:   69-100
Colors:   bay, sorrel, brown, black & gray
 Picture of wild horses. 

The Little Colorado HMA encompasses over 632,000 acres of BLM-administered public lands. The majority of the HMA consists of consolidated public lands along with state school sections and, in the south of the HMA, Bureau of Reclamation lands. The HMA is bounded on the west by the Green River, on the east by Highway 191 on the north by the Pinedale/Rock Springs Field Office boundary. The area is mostly rolling hills with significant canyons breaking up the area. Elevations range from approximately 6,300 to 7,900 feet, and precipitation ranges from 6-10 inches, predominately in the form of snow. The area is unfenced except for sections of the boundary fence between the Rock Springs and Pinedale Field Offices, and along Highway 191. The HMA is divided among Sublette, Lincoln, and Sweetwater counties.

The AML for this HMA is 69-100 horses. Most horses in this area are dark—bay, sorrel, brown, black or gray. The Wyoming horses have a diverse background of many domestic horse breeds. They are most closely related to North American gaited breeds such as Rocky Mountain Horse, American Saddlebred, Standardbred, and Morgan. The horses range from 14 to 15.5 hands and weigh between 750 and 1,100 pounds mature weight. Vegetation in the HMA is dominated by sagebrush/grass, with saltbrush, winterfat, greasewood, and meadow species. Horses typically use a high amount of grass species, the most favorable being needlegrass, Indian ricegrass, wheatgrass, and sedges. The area supports significant wildlife populations including deer, antelope, and sage grouse and domestic cattle and sheep utilize the area lightly in the summer and moderately in the winter.

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