Called "Deadly Pursuit" in the UK. Because of the recent massacre in Hungerford, where Micheal Ryan had gone on a shooting rampage killing around dozen people and injuring a number of others, it was thought to be in bad taste to release a film with "shoot" in the title.
The killer's identity is not revealed until midway through the film. He attempts to evade detection by killing a member of a hiking expedition and taking his place. To keep the audience guessing as to the true identity of the villain, some of the hikers were played by actors known for playing bad guys: notably Clancy Brown, Frederick Coffin, and Andrew Robinson.
The plot of this movie was aped by an episode of the TV show MacGyver. The 4th season episode, titled "The Invisible Killer," features Mac trying to unmask an escaped convict on a scenic hike, and aired only a little over a year after the film was released.
The theatrical trailer features some shots and scenes not used in the final cut. There is a shot of Stantin looking sheepish as the battery powered socks (which Jonathan throws away) fly past him; Jonathan commenting on how he has never seen frostbite on a black man before whilst they are sheltering under the snow's surface; and an alternate shot of Steve forcing Harvey to jump at gunpoint which keeps his identity hidden. Steve's face is also never fully shown in the trailer to maintain the surprise element.
Even though the murderer's identity is kept hidden from the audience - including providing "red herrings" by having known bad-guy actors play several of the hikers - anyone who has seen Highlander (1986) can easily guess which one of them it is on account of the growling voice he uses during the stand-off that sets off the plot. Clancy Brown sounds exactly like that as The Kurgan in that movie.