Since 2003, Wildlife Conservation Society conservation scientists have been involved in a long-term study of the Path of the Pronghorn, an age-old migration route that connects summer range in Grand Teton National Park with winter range far to the south in the western Wyoming’s Green River Valley. The Path is:
One of the longest overland mammal migrations in North America, and the longest left in the Greater Yellowstone Ecosystem.
The only remaining pronghorn migration route to and from Grand Teton National Park.
More than 100 miles long, but at its narrowest, less than 150 yards wide.
More than 90% on federal lands.
(via: Wildlife Conservation Society)