White Mountain Herd Management Area
The White Mountain HMA encompasses 392,649 acres, of which 240,416 acres are BLM-administered public lands. The majority of the HMA consists of checkerboard land ownership within the the Union Pacific Railroad grant. Consolidated public lands with state school sections and small parcels of private land make up the remaining lands in the northeast section of the HMA. The HMA is a high plateau that overlooks Rock Springs. Elevations range roughly from 6,300 to 7,900 feet. Precipitation ranges 6-10 inches, predominately in the form of snow. The area is unfenced except for portions of boundary fence and right-of-way boundaries along I-80 and 191 north.
The AML for this HMA is 250 horses. A full range of colors is present. This herd has a lot of color in it, many of which are paints. Other colors are bay, sorrel, red roan, 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. The health of the horses is good.
Domestic cattle and sheep utilize the area lightly in the summer and moderately in the winter. Vegetation in the HMA is dominated by sagebrush and grass, with saltbrush, winterfat, and greasewood intermixed. 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 elk, deer, and antelope.
Help our wild horses by reporting illegal activity.
Contact your BLM office or call BLM Law Enforcement.
Rock Springs Field Office
280 HWY 191 North
Rock Springs, WY 82902
How To Get There
We invite you to view wild horses; however, it is unlawful to chase and/or catch them. Please allow them to live a free and unmolested life.
The HMA is located directly west and to the north of Rock Springs, Wyoming. The area can be accessed from Rock Springs by going north on US 191 North approximately 14 miles. Turn left onto County Road #14 and follow the Wild Horse Loop Tour signs. The Wild Horse Loop turns left (south) onto County Road #53 and ends up in Green River, Wyoming. For a longer and more extensive experience County Road #14 to County Road #5 can be taken. North on County Road #5 will end at State Highway 28 approximately 15 miles west of Farson, Wyoming. South on County Road #5 will end up just west of Green River, Wyoming. County Roads are typically improved gravel roads maintained at scheduled intervals.
Therefore road conditions vary from very good to rough and rutted from wet weather and possibly impassable. Horses may also be observed on the west side of US 191 North between Rock Springs, Wyoming and Eden, Wyoming.
A quick stop at the field office would allow you to check local conditions and obtain maps. The maps needed for this area are Rock Springs and Farson. Before traveling to the area, make sure your vehicle is in good repair. If it has not stormed recently, you can make this trip in any full or mid-sized passenger vehicle, but a four wheel drive sport utility vehicle (SUV) is recommended. Make sure your spare tire is usable and have drinking water and emergency supplies with you. This area is fairly isolated, and it could be some time before help could arrive. Do not attempt to make this trip during inclement weather. Be especially cautious when there is snow on the ground. Travel in the area is restricted to existing roads and trails. Cross-country travel is not allowed. Don't forget to bring your camera and binoculars.