Portland International Raceway
1.922 Mile Road Course (1988-92)
1.95 Mile Road Course (1993-2001)
Remeasured to 1.969 Miles in 1997
1.964 Mile Road Course (2018-24)
Portland, Oregon
CART sanctioned 1988-2001
INDYCAR sanctioned 2018-24
**Race cancelled due to safety concerns over coronavirus