This region was named in the video game Dragon Ball Z: The Legacy of Goku II. Enemies encountered in the forest area of the Northern Mountains are wild boars, snakes, hawks, the Tiger Bandit Gang, Warlord's henchmen, Eggbots, ladybugs, and triceratops. Squirrels are also shown to live in the forest. Dr. Gero is encountered and fought several times here. The Z Fighters have to destroy the three generators of the barrier protecting Dr. Gero's lab, one of them requiring to move a mother brontosaurus' eggs to be destroyed without killing her offspring, and another one requiring to find the code to enter a special room in Vinnie's house. It is also here that Goku finds the Three-Star Dragon Ball (on the beach in the manga/anime), right before the Cell Games; the boss is a blue T-Rex this time.
In Dragon Ball Z: Budokai 3, the mountains and the doors to Dr. Gero's lab can be seen in the Dragon Universe. Also, the Northern Mountains are a playable battle stage in the Japanese arcade game Dragon Ball: Zenkai Battle Royale.