prototype challenge

Among the enhancements made to the IMSA Prototype Challenge schedule is the evolution of the endurance racing format that debuted in 2018. One year after shifting from two 45-minute sprint races per weekend to a single one-hour, 45-minute endurance race, the series will extend to a three-hour race format for select events in 2019.

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The six-race schedule will feature three-hour endurance races at Daytona International Speedway in early January – run during the Roar Before the Rolex 24 weekend – and Canadian Tire Motorsport Park. The three-hour races will have a minimum of two drivers per car and a maximum of three. All other events will remain one-hour, 45 minutes in length.

2021 schedule