Factual error: The boys go deer hunting somewhere in the Appalachians, but the geology is all wrong. That scene is in North Cascades National Park in Washington State. In addition, the "deer" they are hunting is a Red Stag. Not typically found in the Appalachians.
Suggested correction: Part of the scenery is the North Cascades, including the first mountain shot, Mount Baker, south of the Canadian border.
Someone notes that "Red Stags are not typically found in the Appalachians." In reality, there are no wild red stags in the Eastern US, or anywhere in the US, or in North America, or even in the Western Hemisphere. Red stags are native to most of Europe, the Caucasus Mountains region, Anatolia, Iran, and parts of Western Asia. It also inhabits the Atlas Mountains of Northern Africa.
Thank you! Growing up in Pennsylvania and hunting deer since the age of ten - The use of the Red Stag in the last scene always bothered me. No trained White Tails, I guess. Great movie other than that.
Revealing mistake: In one of the river flooding scenes after the dam bursts, you can see a modern day vehicle (most likely a pickup truck) for a few seconds on a highway next to the river. (01:50:30)
Revealing mistake: During the fight after Witty has been killed, Peiter throws a grenade that lands in a bush on the right of the path up which the enemy are advancing. However, the resulting explosion comes from the centre of the path and not as far away as the grenade flew.