The Medicine Bow pronghorn population is one of the largest herds in the United States with an estimated population of 38,400 animals. The herd summers in the sagebrush steppe and grasslands of Shirley Basin, north of Medicine Bow, Wyoming. Most pronghorn migrate either west to the southern edge of the Seminoe Reservoir or north to Bates Hole, an area south of Casper, Wyoming. During harsh winters, some pronghorn migrate 65–75 miles (105–121 km) as far west as Rawlins, Wyoming. The Shirley Basin is a mostly intact landscape that is dominated by private lands, with only limited public lands along some foothill habitats. During the early 2000s, several large wind energy facilities were developed; some are in high-use migration corridors and in areas designated as crucial pronghorn winter range. The effects of wind energy development on pronghorn are not well understood, but recent research in Shirley Basin revealed wind energy development causes pronghorn to avoid some preferred habitats. U.S. Highways 30 and 287 and Interstate 80 seemingly bound the movement of these pronghorn to the south. Other challenges Medicine Bow pronghorn face are crossing U.S. Highway 487 and miles of fencing, which can often be a barrier to movement. These mapping layers show the location of the Migration routes for Pronghorn (Antilocapra americana) in the Sihrley Basin population in Wyoming. They were developed from 411 migration sequences collected from a sample size of 123 animals comprising GPS locations collected every 2 hours.