The Retreat [DVD]

Set in the Adirondack High Peaks of Upstate New York, two best friends. Gus and Adam, set out for a winter backpacking trip. After a horrifying encounter with a monster, Gus finds himself alone and lost. Now, he must now fight for his life while keeping his grip on reality as he's tormented both physically and psychologically by the evil Native American legend, The Wendigo.