The best way to go to there is to take metro yellow line and get off at station Parc Jean-Drapeau, then walking out and following the preset sight to the area indicated on your ticket. If you want to drive to there, it is possible to park your car in the Casino parking lot before 11 am. But the police will close the road for car traffice for two hours near the end of car race and you have no way to gat out there by car during that time.