This season, Marty, Tom, Eustace, Rich, Kyle and new Mountain Man Morgan, are preparing early for another long and brutal winter, but remain determined to face the season head on. In Alaska, Marty returns to the Revelation Mountains to put down roots with a new trapline and his family is coming along for the ride, as long as he can finish building the cabin in time. In Montana, a new threat deals an early blow to veteran mountain man Tom, who is left to pick up the pieces as winter sets in and the rules of nature he's come to rely on over his many decades in the Yaak get upended. Rich finds himself battling a full-scale predator invasion in Montana's Ruby Valley as he tries to keep the area's livestock safe and in the Blue Ridge Mountains, Eustace takes a gamble on a new opportunity wrestling 100-foot-tall trees that he hopes will jumpstart his lumber business. While in New Mexico's rugged Cimarron, Kyle works to secure a legacy to pass on to his son, Ben and in Alaska's harsh heart, new mountain man, Morgan, attempts the most epic trek of his life - a nearly 300-mile journey across the Great Alaska Range - to claim his own piece of the last frontier.