Large Mammals in Denali: How Many Are There? On the north side of the Alaska Range, there are approximately 300 - 350 grizzly bears. This number is based on densities determined using radiocollaring of bears south and west of Wonder Lake (about 70 bears per 1,000 mi2 or 27 bears per 1,000 km2), then extrapolating to all grizzly bear habitat. On the south side of the Alaska Range, brown bear density is about 72 bears per 1,000 mi2 (28 bears per 1,000 km2). The density of grizzlies is likely to be higher south of the Alaska Range because the habitat includes more salmon streams. Skip to footer. Population estimates are an important part of the information needed to conserve populations of large mammals in Denali. Surveys are conducted frequently enough to estimate population sizes and identify population trends. But wildlife researchers also collect data on animal movements, productivity (number of young), health, survivorship, food preferences, and mate selection. Along with population trends, this information helps resource managers understand and manage these species in the park. The goal is to maintain the natural population dynamics of wildlife. National Park Service Logo.