It began on 5 January at Daytona International Speedway, and concluded on 11 October at Road Atlanta.
The IMSA Prototype Challenge series is for future IMSA WeatherTech SportsCar Championship drivers and veteran drivers alike.
Entering its 14th season, IMSA Prototype Challenge shifts to a single-class, endurance race format in 2019 with six races held on North America’s most premier road courses.
The endurance format pairs two-drivers per car in a six race season.
Bold - Pole position Italics - Fastest lap