Portland International Raceway
1.915 Mile Road Course (1987)
1.922 Mile Road Course (1988-91)
1.969 Mile Road Course (1999, 2002-03)
Portland, Oregon
IMSA sanctioned 1987-91
PSCR sanctioned 1999
CART sanctioned 2002-03
| Race # | Date | Miles | Winner |
| 1 | 7/25/1987 | 47.875 | Tim Colwell |
| 2 | 7/31/1988 | 57.66 | Harald Huysman |
| 3 | 7/30/1989 | 61.504 | Robbie Buhl |
| 4 | 7/29/1990 | 55.738 | Steve Cameron |
| 5 | 7/28/1991 | 49.972 | Bryan Herta |
| 6 | 6/19/1999 | 51.194 | Jeff Simmons |
| 7 | 6/16/2002 | 53.163 | A. J. Allmendinger |
| 8 | 6/22/2003 | 63.008 | Leonardo Maia |