earthnashes:

The “Super Circuit” is the name of the organization who holds the kart races, and they hold a grand racing competition once every four years, in which the races will be held all throughout the world in chosen locations. Because of this, it allows for the tracks used for the huge competition to always vary and rarely are they exactly the same, even if they may use the same overall area and themes for some of their circuits.

That said, The Super Circuit is also known for their more public-friendly locations (open all year long) in which people can race their karts or participate in a kart battle simply for fun. Many of the rulers of this world’s kingdoms have participated in at least one of the many tournaments held, including Peach, Daisy, Donkey Kong, Bowser, so on.