The gray wolves of Yellowstone National Park are built for life in one of the most rugged and varied landscapes in North America. Adult Yellowstone wolves typically weigh between 80 and 130 pounds, though males are generally larger than females. In fact, the largest wolf ever recorded in Yellowstone weighed an impressive 143 pounds—a true testament to the power and size these wolves can achieve in this region.Standing about 26 to 32 inches at the shoulder, Yellowstone wolves can reach lengths of