Don't go in the Woods Alone

1981 On a rural wooded mountain, an unseen assailant brutally murders a hysterical woman. Meanwhile, a bird watcher, and four friends—Peter, Joanne, Ingrid and Craig—are trekking through nearby wilderness. Unbeknownst to them, another tourist is thrown over a waterfall (landing near some oblivious frolickers) and his mother is wounded, and dragged away. The four backpackers set up camp for the night, and elsewhere a pair of honeymooners are attacked in their van and murdered. The next day, the two couples continue their hike. Meanwhile, an artist painting a scenic view is stabbed to death, and her young daughter is kidnapped.