The circuit is located on Ã le Notre-Dame , a man-made island in the St. Lawrence River . It is part of the city of Montreal , was originally named the Ã le Notre-Dame Circuit . The circuit , at Parc Jean-Drapeau on Ã le Notre-Dame , a man-made island in the St. Lawrence River that is part of the city of Montreal , was originally named the Ã le Notre-Dame Circuit .