The 1997 Mosport Festival was a professional sports car racing event held at Mosport International Raceway in Bowmanville, Ontario, Canada on August 29 to the 31st, 1997. It was the seventh round of the 1997 Professional SportsCar Racing Championship season. The weekend featured a separate 1 hour 45 minute, 52 lap Exxon Supreme GT Series race for GT cars on the Saturday and a 2-hour, 86 lap Exxon World SportsCar Championship race for World Sports Cars on the Sunday. The split races were the only time since the 1995 revival of the Mosport IMSA round that the race has gone two instead of three hours.