2018 WeatherTech SportsCar Championship Calendar

The IMSA WeatherTech SportsCar Championship is the premier sports car racing series in North America, renowned for its multi-class format and grueling endurance events like the Rolex 24 At Daytona and the Twelve Hours of Sebring. The championship features four distinct classes: the top-tier Grand Touring Prototype (GTP), which utilizes high-tech hybrid prototypes; the Le Mans Prototype 2 (LMP2) class for privateer-based prototypes; and two production-based classes, GTD PRO (professional factory-backed efforts) and GTD (Pro-Am entries), both of which utilize GT3-specification machinery. Governed by IMSA and sanctioned by NASCAR, the series is a global showcase for major automotive manufacturers and combines sprint races with legendary long-distance challenges. By employing a Balance of Performance (BoP) system to ensure parity across diverse vehicle designs, the championship delivers highly competitive racing that tests the endurance of both elite professional drivers and specialized machinery on the most iconic road courses and street circuits in the United States and Canada.