Perform the following steps on any track to unlock an extra track
-At the first ramp do an easy trick: SQUARE, TRIANGLE.
-At the second ramp do a medium trick: SQUARE, CIRCLE, TRIANGLE.
-At the third ramp do a hard trick: SQUARE, CIRCLE, X.
-At the forth ramp do the following: Square, X, Triangle, Circle.
-Then finish the race and the bonus track will load.