Unit 515 is situated in south central Montana, northwest of Billings and north of Columbus. This general unit is bordered by the Musselshell River to the north and the Yellowstone River to the south. This district is home to a significant population of mule deer, with a high number of these animals being harvested each year during both the archery and rifle seasons, which are both general seasons. While mule deer numbers are lower than their historical averages, there is still ample opportunity to hunt these animals in any part of the district.