Race down the big jump at the start, then take a few turns. Between two buildings on your right side will be a rail (marked with two lights). Take it. At a certain point, the route will split into two different paths, Look carefully to see that there is a little route between them. Take it and go for the jump over the building. Later at your left-side you will see an 'out of bounds' route. Make sure that you are taking the rail. Another quick way happens when you are riding to the quarterpipe. Do not go on the quarterpipe; instead make a fast turn.