Mule deer in the Atlantic Rim South population are part of the Baggs herd unit that is managed for approximately 19,000 animals. These mule deer winter in the sagebrush canyons and basins north and west of Baggs, Wyoming and migrate north and east 20–50 mi (32–80 km) to various summer ranges (fig. 23). Many of these deer must navigate coal-bed methane developments situated along the migration route between their seasonal ranges. In addition to navigating gas developments, many of these deer cross Highway 789 during winter and migration. The Wyoming Department of Transportation (WYDOT) recently installed two underpasses and several mi of game-proof fencing to facilitate highway crossings across Highway 789 and help minimize wildlife-vehicle collisions and maintain corridor connectivity. These data provide the location of migration routes for mule deer (Odocoileus hemionus) in the Atlantic Rim South population in Wyoming. They were developed from Brownian bridge movement models using 277 migration sequences collected from a sample size of 89 animals comprising GPS locations collected every 2-8 hours.