Once you arrive, head toward the vendor. You will notice that it is a 3 way path (one that goes to your ship, to the train, and to the obstacle course). Go to the edge of the railing where there is no path. drop down and hug the wall and you will land on a ledge. go to the edge of that ledge and carefully drop down into a tunnel. you will see many boxes and a golden bolt! Collect all of them and if you really want to earn more bolts (like i did) then shoot the hover cars.