Specifically, the filming locations included:
* The Bitterroot National Forest (near Darby, Montana) - for many of the forest scenes and parachute jumps.
* The Lolo National Forest (near Missoula, Montana) - for some additional forest scenes.
* Missoula, Montana - for some of the town scenes.
While the movie was set in Idaho, much of the filming took place in Montana due to the presence of suitable forests and access to resources.