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Lander and Rawlins Field Offices
Release Date: 09/02/11
Contacts: Sarah Beckwith, 307-347-5207    
  Serena Baker, 307-212-0197    

BLM Releases Decision for Red Desert Complex Wild Horse Gather

The Lander and Rawlins field offices of the Bureau of Land Management (BLM) have released a finding of no significant impact (FONSI) and decision record (DR) for a wild horse gather in the Red Desert Wild Horse Herd Management Area (HMA) Complex, located in portions of Fremont, Sweetwater and Carbon counties. The gather is scheduled to begin in early October.

The BLM will gather, treat with fertility control and release wild horses in the Red Desert Complex which encompasses the Antelope Hills, Crooks Mountain, Green Mountain, Lost Creek and Stewart Creek HMAs. Approximately 1,240 wild horses will be gathered from both inside and outside the HMAs and 400 horses will be returned to the HMAs, including 200 mares treated with the porcine zona pellucida (PZP) fertility control vaccine. Up to 390 of the gathered horses inside the HMAs will be removed to reach the appropriate management levels for the HMAs and up to 450 wild horses outside the HMAs will be removed.

The Red Desert Complex is part of a pilot program to maintain herd size primarily by the use of fertility control. Mares from the complex were treated in the fall of 2009 and a recent inventory flight shows that reproduction rates have decreased to 12-15 percent, down from the national average of 20 percent per year. The gather is necessary to re-vaccinate the mares that were treated with PZP in 2009. This booster shot will slow the growth rate of the population that is returned to the Red Desert Complex and help to achieve a thriving natural ecological balance and a multiple use relationship with other resources within the HMAs.

The environmental assessment, FONSI and DR are available at The decision is subject to administrative review through the appeal process, which is outlined in the DR. For more information, please contact BLM Wild Horse Specialist Scott Fluer at 307-332-8400.

Wild horses that are removed will be available for adoption to qualified applicants. For more information about adopting a Wyoming wild horse, visit

The BLM manages more than 245 million acres of public land, the most of any Federal agency. This land, known as the National System of Public Lands, is primarily located in 12 Western states, including Alaska. The BLM also administers 700 million acres of sub-surface mineral estate throughout the nation. The BLM's mission is to sustain the health, diversity, and productivity of America’s public lands for the use and enjoyment of present and future generations. In Fiscal Year 2015, the BLM generated $4.1 billion in receipts from activities occurring on public lands.

Lander and Rawlins Field Offices   1335 Main Street      Lander, WY 82520            1300 North Third      Rawlins, WY 82301  

Last updated: 09-16-2011