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Sublette Antelope Migration Corridor to move towards Governor’s designation



September 16, 2025






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LANDER — At the Sept. 9-10 meeting in Lander, the Wyoming Game and Fish Commission voted to recommend consideration of the entire Sublette Antelope Migration Corridor for designation to the Governor, including the East of Farson and the Red Desert segments. The decision came after initial recommendations from the Wyoming Game and Fish Department, followed by public comment and discussion.

The Sublette Antelope Migration Corridor is used by one of Wyoming's largest antelope populations, with migration routes ranging from 6 to 165 miles across Fremont, Lincoln, Sublette, Sweetwater, and Teton counties. The corridor was formally identified in March 2024 to delineate paths antelope use as they migrate between summer and winter ranges. Game and Fish used data from more than two decades of research, including GPS collar data from more than 500 antelope, to understand and manage these movements.

Game and Fish is working to officially designate the corridor through the process outlined in the Governor's Migration Corridor Executive Order. The goal is to identify and mitigate threats the pronghorn are facing. Threats that are evaluated for all corridors include habitat fragmentation, off-road vehicle use, roads and fencing, invasive annual grasses and poor habitat quality. Using data to delineate seasonal use aids in the long-term management of the herd.

During the September meeting, Game and Fish recommended the designation of eight segments of the corridor to the Commission (North, Bondurant, Foothills, East of 191,Central, Caplet, Fontenelle, and Southwest). Keeping in line with the Executive Order’s flexibility between designation and identification, the two southeastern segments, East of Farson and Red Desert, were not recommended for designation at this time. Game and Fish cited a lack of high-use segments, no identified bottlenecks and limited threat levels in this area.






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