Imsa Calendar 2025. Showcasing the stability and consistency that imsa fans, competitors and stakeholders have come to expect, the 2025 schedules will not differ substantially from this year’s calendar. Imsa president john doonan said the sanctioning body and its partners have “earned the right” to be in such a strong position to be able to confirm the 2025 weathertech.
The imsa weathertech sportscar championship has four classes of vehicles: Imsa shocked both the racing community and fans by revealing the 2025 race.