The IMSA GT Championship raced on 44 different circuits in its 28-year history.
- ^ Held two races in 1972, 1974, 1984–86, and 1996; held three races in 1973 and 1975–83.
- ^ Held two races in 1976 and 1977.
- ^ Held two races in 1986–92.
- ^ Held two races in 1975–77 and 1982.
- ^ Held two races in 1976–82, 1987, 1991, and 1998.
- ^ Held two races in 1997 and 1998.
- ^ Held two races in 1984–91.
External links[edit]
- ^ "Columbus". Retrieved 2 July 2022.
- ^ "Rememer When Downton Was Transformed Into A Racetrack? A Look Back At The Columbus 500". Retrieved 2 July 2022.