IMSA Calendar 2026

North America's premier sports car racing series, the IMSA WeatherTech SportsCar Championship represents the pinnacle of endurance racing on the continent. This prestigious championship combines cutting-edge technology with the drama of long-distance competition across iconic American racetracks.

What is IMSA?

The IMSA WeatherTech SportsCar Championship is a sports car racing series that features intense multi-class competition between sophisticated prototypes and production-based GT cars. From the legendary Rolex 24 At Daytona to the challenging Petit Le Mans, teams and manufacturers battle for supremacy in races that test both speed and endurance.

Technical Excellence

The championship features four distinct classes of competition. The premier Grand Touring Prototype (GTP) class showcases purpose-built race cars from major manufacturers, while the Le Mans Prototype 2 (LMP2) class offers high-performance prototype racing. The GT categories include GTD Pro and GTD, both featuring race-prepared versions of exotic sports cars from renowned manufacturers like Porsche, BMW, and Mercedes-AMG.

Racing Format

IMSA events range from sprint races to demanding endurance contests, with the season anchored by the prestigious North American Endurance Cup events. These legendary races include the Rolex 24 At Daytona, 12 Hours of Sebring, and Petit Le Mans. Each event challenges teams with varying weather conditions, changing track conditions, and the complexities of multi-class racing.

Championship Heritage

Born from the merger of the American Le Mans Series and the Rolex Sports Car Series, IMSA continues a rich tradition of sports car racing in North America. The championship maintains close ties with international endurance racing, including compatibility with the 24 Hours of Le Mans regulations, while preserving its unique American identity.

Racing Excellence

The series attracts world-class driving talent from across the globe, including champions from Formula 1, IndyCar, and international sports car racing. Teams must master both outright speed and race strategy, managing complex factors like driver rotations, fuel strategy, and tire management throughout races that can last up to 24 hours.