IMSA. The IMSA Weathertech Sportscar Championship races across North America in 12 races. 10 In the U.S. and 2 in Canada. IMSA races in Florida, California, Canada, Ohio, New York, Wisconsin, Indianapolis, and Georgia. Rolex 24 Of Daytona, 12 Hours Of Sebring, Acura Grand Prix Of Long Beach, 4 Hours Of Mid-Ohio, 6 Hours Of The Glen, Canadian Tire Grand Prix, Weathertech Championship Weekend, Michelin GT Challenge At VIR, Tirerack.com Grand Prix At Indianapolis, and the Motul Petit Le Mans.