In the twilight of his life Bill Bryson (Robert Redford) is at another crossroads in life. His grandkids are of age and a friend passed away but, Bryson feels like there’s room for one last adventure. After discovering a path leading to the Appalachian Trail (AT), near his New Hampshire home, Bill decides to hike the trail from beginning to end. Hiking the near 2,200 miles of trail from Northern Georgia to Mount Katahdin, Maine is a serious undertaking for the most experienced hikers. For a 70-year-old, with little knowledge of hiking or camping; thru hiking the AT may be a death sentence. Bryson’s wife Cathy (Emma Thompson) steps in with a mandate: Hike with a partner or don’t go at all. After rummaging through the rolodex and not finding willing participants, nearly gives up on the expedition; until he receives a surprise phone call from Stephen Katz (Nick Nolte), an estranged friend. Katz is a mess of a man. An overweight, bumbling, recovering alcoholic, which is dubious as whiskey is found in Katz’s backpack; Katz makes Bryson look like an Olympian. Unphased by the odds against them, Katz and Bryson head to Northern Georgia via Atlanta in the Spring, hoping to complete the 15 state, 2,185 mile journey before winter. What could possibly go wrong?