Mid-Ohio Sports Car Course
2.4 Mile Road Course (1976-89)
2.25 Mile Road Course (1991-96)
Remeasured to 2.258 Miles in 1997
Lexington, Ohio
IMSA sanctioned 1976, 2009
SCCA sanctioned 1981-82, 89, 91-97, 2014-16, 21-24
WCAR sanctioned 1986-88
CART sanctioned 1998-99, 2003
USAC sanctioned 2017-18