When you are about 50% through the lap, you will see pine trees to the left and a hill straight ahead. Instead of going up the hill, turn left and go through the trees to enter a cave. When you get out of the cave, do not turn left on the road. Keep driving straight and you will be in another shortcut -- make sure you do not fall in the lake, or you will restart on the road.

At the end of the lap, you will enter the city. Before you go past the front lift where the rocks are, turn directly left and you will be on a shortcut. Note: It only appears at certain times.