Bowser Castle 2

Bowser Castle 2 is a race course in Super Mario Kart and it is the fourth course of the Flower Cup. It features all the elements typical of Bowser Castle courses. These include Thwomps (which will only start going up and down in the second round), jump lines and the lava pool. Characteristic of this track are the forks, where the player can choose one way to go. This offers them the possibility to use a zipper or an extra Item Box. At one point, however, the wrong decision leads to a trap: Where there are a lot of coins, there's one way forward and one left. Choosing the left one leads to a plank which says "STOP"; driving on will result in falling into the lava. The player can try, however, to reach the opposite plank with a Cape Feather jump, or by using a mushroom boost and hopping, however this is very difficult. When falling into the lava, they may be placed on the other side by Lakitu. This is the longest course in the game.

The course reappeared in Mario Kart: Super Circuit, and is the first track in the Extra Lighting Cup. It uses the background from GBA Bowser Castle 2. The Thwomps and Zipper were removed from the track.