Where We Work: Wyoming

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Photo: Mark Goecke, Wyoming Game and Fish Department

Flanked by the Wyoming and Wind River Ranges, the Upper Green River Valley forms the southern core of the world’s most intact temperate ecosystem—the Greater Yellowstone. For more than 7,000 years, pronghorn antelope, elk, Shiras moose and mule deer have navigated the valley’s unique topography every season. The Valley is home to the “Path of the Pronghorn,” the longest land mammal migration in the continental United States, stretching from Grand Teton National Park south to winter range in the Red Desert, a distance of more than 200 miles. Yet due to its unparalleled natural resources, the valley and its wildlife are now in peril.