SUBLETTE COUNTY—Gov. Mark Gordon heralded Wyoming’s first-ever designation to protect a pronghorn migration corridor — a more than 2 million-acre web of habitat — at Trapper’s Point, which he called a “wonderful passageway.”
“How incredibly valuable it is that you are standing here today,” Gordon told the crowd, “to witness this remarkable moment.”
Gordon commemorated the moment with his feet planted on the narrow bulge of high country that splits the Green and New Fork rivers. Thousands of years ago, the site was a well-used hunting ground for Native Americans — it’s the earliest known killing and processing site for pronghorn in North America. Now it boasts a wildlife overpass.
No pronghorn were to be seen during the especially windy Friday afternoon gathering, which attracted 75 attendees from nearby Pinedale and other western Wyoming communities.
Now Trapper’s Point is officially classified as a “bottleneck” for the Sublette Pronghorn Herd — one of 13 such bottlenecks. That classification is supposed to prevent any surface-disturbing activity, with the intent that pronghorn can keep passing through Trapper’s Point for generations to come.
Protecting the ability of the fleet-footed, tawny-and-white ungulates to migrate is a “key factor” in sustaining their population, Wyoming Game and Fish Director Angi Bruce said.
“This becomes even more important in severe winters or extreme droughts,” Bruce said. “Pronghorn are long overdue for recognition.”
Pronghorn in Sublette, Teton, Sweetwater and Lincoln counties travel a long road — some migrate more than 200 miles to escape harsh winters, trekking south into the lower Green River Basin, a semi-arid sweep of sagebrush steppe between Pinedale and Rock Springs. Then in the spring, they retrace those paths, returning to summer ranges, lush with verdant vegetation, even going as far as Grand Teton National Park.
There was also a long road of bureaucracy to get to this point.
Nearly three decades of effort preceded the formal designation of the migration routes used by the Sublette Pronghorn Herd, which is the farthest-traveling and among the largest pronghorn herds in the West.
Jackson Hole biologists long knew that the valley’s pronghorn left in the winter. But details were hazy on where they went and how they got there until around the turn of the century. Using data from tracking collars, biologists like Joel Berger, Steve Cain, Hall Sawyer and Doug Brimeyer helped delineate the route.
In 2008, a Bridger-Teton National Forest plan amendment established a portion of the path as the nation’s first designated wildlife migration corridor.
Popularized by its branding as the “Path of the Pronghorn,” the route has received press in national publications like High Country News and the New York Times.
But the southern reaches of the migration through the energy-rich Green River Basin have faced major political opposition since the early 2000s. Wyoming first attempted to protect those travel corridors in 2019, under a policy administered by the Wyoming Game and Fish Department. That effort was halted after a coalition of industry trade groups and counties protested.
Then, in early 2020, Gordon revamped the migration policy with an executive order. Still, the Sublette Pronghorn Herd proposal gathered dust, even as development threatened the route.
Game and Fish revived efforts to protect the migration in late 2023 and early 2024. Biologists pulled together one of North America’s most comprehensive migration datasets, benefiting from approximately two decades of GPS collar information collected from more than 400 pronghorn.
Some controversy followed the process until near the end. There was a debate about whether to designate the migration’s two easternmost segments, in the Red Desert and east of Farson. The Game and Fish Department proposed excluding the routes, but was overridden by its commission. Then Gordon upended that decision, excluding the two segments.
Vetting the migration corridor through a Gordon-appointed working group was the second-to-last step in the designation process.
“Today’s designation demonstrates that voluntary, locally driven conservation works,” said Robb Slaughter, who chaired the group, during the commemoration at Trapper’s Point.
Time will tell if that’s the case. Wyoming’s migration policy is, by design, permissive of development. Private land is exempt from protections, and designation is not an assurance that new stressors won’t be added to the landscape.
“Today is not the end of the process,” Slaughter said. “It’s the beginning of the next chapter. Continued monitoring, adaptive management, research, and cooperation will ensure these recommendations remain effective as conditions change.”
But Friday was the end of the migration designation process. The governor’s informal OK — no signature was needed — was the last step, said Sara DiRienzo, the governor’s deputy policy advisor.
Wildlife advocates celebrated the moment.
“This is historical,” Bruce said. It’s the first effort to protect the full length of a pronghorn migration corridor in the nation, she said.
