Into the Wild (2007) is Sean Penn’s acclaimed survival drama based on Jon Krakauer’s bestselling book. It tells the true story of Christopher McCandless, who abandoned modern life to journey into the Alaskan wilderness, where his search for freedom and meaning turned into a harrowing fight for survival.

Från IMDB:
After graduating from Emory University, top student and athlete Christopher McCandless abandons his possessions, gives his entire $24,000 savings account to charity and hitchhikes to Alaska to live in the wilderness.