Sir Anthony Hopkins had a brush with death during filming in Alberta. He was taking painkillers for a neck problem. He fell in a river, and didn't feel how cold he was becoming, until he began to suffer from hypothermia. He had to be rushed to the hospital to be treated.
"Bookworm" was considered as a title for this film, other titles considered were; "Wild", "Wilder", "The Wild", "Into the Wild", "Wilderness Now", "Deadhunt", "Deadfall", "Edge", "On the Edge", "Bloody Betrayal", and "The Bear Roared".
This film inspired a highly successful television reality show of the same name in Brazil, where participants were selected from normal people, including executives, graduates, and clerks, left in a wild and deserted area of Brazilian landscape, and had to survive using techniques similar to the ones mentioned by Sir Anthony Hopkins' character.
After reaching Jack Hawk's (Gordon Tootoosis') empty cabin, and after convincing Morse (Sir Anthony Hopkins) to fly further to Big Bass Lake in search of Hawk, Green (Alec Baldwin) exclaims elatedly, "There's the spirit that beat the Japanese!" Alec Baldwin played Lieutenant Colonel James Doolittle, who planned and led the counter-strike against the Japanese in Pearl Harbor (2001).
Just before the end credits start rolling, there is a caption that reads: "Twentieth Century Fox and the Producers wish to thank Bart the Bart and his trainer Doug Seus, for their contributions to this film."