Mountain Men returns for a fourth season and continues to follow the real life challenges of six men who are living off the land and off the grid. Far away from civilization, they use survival skills and sheer cunning to stay fed, clothed and alive. After surviving the most brutal winter in decades, Marty, Tom, Eustace, Rich, Kyle and new Mountain Man Morgan are preparing early for another long and severe winter. If they are to survive the chaos and unpredictability of nature, they will have to adapt or die. In Alaska, Marty returns to the Revelation Mountains, a new threat deals an early blow to veteran mountain man Tom in Montana and Rich finds himself battling a full-scale predator invasion in Montana’s Ruby Valley.