Imsa 2025 Schedule Updates. This morning at sebring international raceway — site of saturday’s 72nd mobil 1 twelve hours of sebring presented by cadillac — imsa president john doonan revealed the slate of races that will make up the 2025. Imsa shocked both the racing community and fans by revealing the 2025 race.

Schedules revealed at surprise gathering. Imsa has confirmed the 2025 weathertech sportscar championship schedule, some five months ahead of its traditional release date.