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- The scene where Paul Kirby (William H. MacyWilliam H. Macy) seems to have died and then comes up from behind them and says "I'm not going anywhere" is very reminiscent of Indiana Jones and the Last Crusade when the tank falls off the cliff and everyone thinks Indiana Jones is dead and then he walks up behind them and looks over with them. The themes for both were written by John WilliamsJohn Williams, and in both series, the original movie was directed by Steven SpielbergSteven Spielberg.
- Michael CrichtonMichael Crichton worked with the screenwriters several days to brainstorm about a story, but left after some days when he could not come up with a satisfactory idea.
- The original script had Billy Brennan killed, but Alessandro NivolaAlessandro Nivola protested and director Joe JohnstonJoe Johnston had him brought back for the end.
- According to an interview with William H. MacyWilliam H. Macy, the actor said the film's animatronic Spinosaurus had a 1,000-horsepower motor and that creature could turn its head at twice the force of gravity, with the tip of its nose moving at a speed of more than 100 miles per hour.
- Shooting for the film began before the final script was completed.
- Near the end of the movie, when the Spinosaurus attacks Amanda Kirby (Téa LeoniTéa Leoni) in the water and tries to grab her, the actress admits that she was injured by accident during those scenes when its claws would scratch her. When Leoni returned home from work one night and her husband David DuchovnyDavid Duchovny saw the various slashes on her back she received during filming, he asked "At what point in this movie do they whip you?"
- A few of the action sequences are borrowed from left over ideas from the first two [Jurassic Park] films, some of which were in the original scripts and made it as far as being storyboarded before they were scrapped due to time and budget constraints. These scenes include the pteredon and river boat sequences.
- Originally, the film included Jeff GoldblumJeff Goldblum's character, Ian Malcolm. But a few days into filming, Goldblum injured his leg and decided to drop out, stating that his character wasn't that important to the script.
- The Spinosaurus was the largest animatronic ever built. It weighed 12 tons and was operated by hydraulics. This allowed it to operate while completely submerged in water.
- After the Spinosaurus' attack on the airplane, Grant asks Billy how he would classify the animal. Billy's first inclination is to say the dinosaur is a Suchomimus or Baryonyx, due to the large snout. This is a joke meant for many fans of the film who, when the new movie's logo was first revealed, said the exact same thing Billy did. Many long pages on the message boards of fan pages and the official page were dedicated to this debate.