Character mistake: When recruiting Burt to help repel the Graboid attack in the arctic, one of the team members says he's ideal for the job because of his experience hunting them on two continents, a reference to the first two films (Nevada and Mexico in North America) and Tremors 5 (Africa). However, this repeats the mistake in Tremors 5 in overlooking the Argentina incursion stopped by Burt at the beginning of Tremors 3, which gives him experience fighting Graboids/Shriekers/Ass-Blasters on three continents, not two. Burt, himself having overlooked Argentina in Tremors 5, does not correct her. And it's not as if the film is completely ignoring Tremors 3, since it shows the flashback of Burt being swallowed by a Graboid in that movie, which is how he got infected with the deadly parasite killing him here.
Factual error: At the beginning 'researchers' are working on the 60th parallel in the province of nunavut. Nunavut is not a province; it is a Canadian territory. They appear to be working in the winter. At the 60th parallel, the winter would be almost dark and the sun would never be that high in the sky. Given that sun, it would be summer. In the summer, you would not have that snow cover.
Continuity mistake: At the end of the film as Travis is kissing Rita, the right side of his face magically cleans itself.
Revealing mistake: When the final graboid is approaching the trap they set for it, the path it is going to take is blatantly visible despite a small rise setup to block the view.
Revealing mistake: Several times when Swackhamer is throwing explosives, you can see the remnants of the devices the filmmakers used to create the explosion effect. They look like containers.
Continuity mistake: When Rita is running toward the hanger in a scene that mirrors the first film, she is running on a long wood walkway. In the next shot however, she is on the dirt.
Revealing mistake: When the doctor with the satellite phone runs to the car, he is being chased by another member of the team, and of course the graboid. Look ahead of the graboid. The path it will take is visible.
