Grizzly (1976)

A park ranger along with a military veteran helicopter pilot and a naturalist tries to halt the wild rampage of a prehistoric grizzly bear of 15 ft height and weighing 3,000 lb who's gone rogue n has developed a taste for human blood n flesh. While the bear keeps on killing hikers n campers, the supervisor refuses to close down the National Park. When the attacks become a national news story, the park's supervisor allows amateur hunters into the forest but the park ranger along with the helicopter pilot and the naturalist takes it upon himself to kill the bear.