Bear Management Areas. Wildlife biologists established bear management areas in locations where there is a high density of elk and bison carcasses and lots of bear activity. To reduce encounters between bears and humans, the park restricts certain activities in these areas. Restrictions may include area closures, trail closures, a minimum group size of four or more people, day use only, or no off-trail travel. View map and area descriptions below. Bear Management Areas - Yellowstone National Park (U.S. National Park Service)