River of Bears is about the legendary McNeil River Alaska State Game Sanctuary. During the summertime it hosts the largest congregation of brown bears in the world. Bears come from hundreds of miles to the sanctuary to mate, raise cubs, and dine on the abundant sedge grass and salmon. On a typical day in July over fifty bears can be seen at the McNeil River falls, feasting on salmon desperately swimming upstream to spawn. The show tells the remarkable story of these bears as they prepare for the coming harsh Alaska winter, and the visitors and scientists who come every summer to see them.