Mario Circuit 1 has one shortcut in it. After the third turn, use a mushroom in the dirt to cut off part of the track.
Super Mario Kart
In Super Mario Kart, this course with the first course of the Mushroom Cup. This course is simple curve, with the only obstacles being the pipes.
Mario Kart: Super Circuit
In Mario Kart: Super Circuit, this course with the first course of the Extra Mushroom Cup. Nothing has changed from Super Mario Kart.
Mario Kart DS
In Mario Kart DS, this course was the first course of the Shell Cup. It was mostly the same as the original, except the pipes have moved.