Jeremiah Johnson will always be one of my favorites. It's old, but the risks and how they showed the wilderness is really good. A bad movie I still watch sometimes is The Ghost and the Darkness… it's over the top, but somehow fun.
Jeremiah Johnson movie is great but it makes being a loner in the mountains sound way better than it was. Real mountain men relied on others a lot. Still a good film, just not the full story.