This course is one of the longest in the game, but it has a shortcut that can cut a lot of time off your lap. It is possible to jump over the wall to the left of the starting line by using any one of the four small jumps there. Although you can make it over the wall without the assistance of any speed boosting item, a Mushroom or Mini-Turbo assist is helpful. Approach the wall at a high speed so that you are driving directly at it as you reach the peak of the small hill. Jump right before you hit the wall and you will fly over it. The timing requires some practice, but once you master it, it is not too difficult. It is also possible to jump back over the wall on the other side of the starting line, but the return jump is much more difficult and requires precise jump timing and aim.