Continuity mistake: In the scene where the scouts jumped in the river, you see Bragdon and the FBI agent get in the helicopter. The the camera goes to Max in the river going downstream; he looks at his watch and puts it up to his ear because the watch broke, since he was in the water. But later in the scene, where Max is climbing up the hill and looks at the mountain they're about to climb, he looks at his watch and it's still working.
Continuity mistake: In the scene where the scouts fill the cantine with the sleeping pills you see Max walking in the woods with the scouts behind him. If you look at Max, you can see he's smoking a cigarette, but when the camera goes up to Max, the cigarette is gone.