The Carter Mountain pronghorn herd contains approximately 7,000 animals—half which migrate 10–60 mi (16–97 km) west from common winter ranges in the Bighorn Basin to summer ranges near the Absaroka Range (fig. 29). During this migration, pronghorn must cross U.S. Highway 14 and Wyoming Highway 120. Most pronghorn summer in ranges west of Wyoming Highway 120 along the Greybull River, but some individuals summer in the South Fork Shoshone River drainage. A segment of the population gains nearly 6,000 ft (1,829 m) in elevation to summer on the high plateaus of the Absaroka Range and upper Greybull River and spend the summer months at 10,000–11,000 ft (3,048–3,353 m) above sea level in alpine meadows they share with Ursus arctos (grizzly bear) and Canis lupus (wolf) populations. Challenges to this herd’s migration include multiple highway and fence crossings. Habitat loss and fragmentation from residential development are also a concern. These mapping layers show the location of the Migration routes for pronghorn (Antilocapra americana}) in the Carter Mountain population in Wyoming. They were developed from 180 migration sequences collected from a sample size of 58 animals comprising GPS locations collected every 2 hours.