Timber's Island is the island where the events of Diddy Kong Racing and Diddy Kong Racing DS take place; it also serves as the hub area for both games. As its name suggests, Timber's Island is ruled by Timber and his parents, and it has a magical protector named Taj.
In the game's backstory, an intergalactic evil pig, Wizpig attempts to conquer Timber's Island. During the game, the racers try to stop Wizpig from taking complete control over the island.
Timber's Island hosts many environments, including a prehistoric valley, a beach, an arctic area, and a medieval village. Each area has a path connecting to the central area of the island. The central area has a head of Wizpig sculpted out of rock. When the player collects all pieces of the Wizpig Amulet, the player can go into the opened mouth of the head, where the first race against Wizpig takes place.
Timber's Island consists of four zones, each hosting four racetracks. Each zone has their own environment and an overseer native to that environment. The overseer is the boss of the zone, and the player can race them once they clear every racetrack in a zone.