PORTLAND
International Raceway
Oregon - United States
1961-06
1961-10
1962-06
1963-10
1967-05
1967-06
1968-06
1968-08
1969-06
1970-09
1971-06
1972-09
1973-06
1975-06
1976-06
1977-06
1978-06
1978-08
1979-06
1979-08
1980-06
1981-06
1981-08
1982-06
1982-08
1983-06
1983-07
1984-06
1984-07
1985-06
1985-08
1986-06
1986-07
1986-08
1987-06
1988-06
1988-07
1988-07
1989-06
1989-07
1990-06
1990-07
1991-06
1991-07
1992-06
1993-06
1993-08
1994-06
1994-08
1995-06
1996-06
1997-06
1998-06
1999-06
2000-04
2000-06
2000-09
2001-06
2001-08
2002-06
2004-06
2004-07
2005-06
2005-07
2006-06
2006-07
2007-06
2018-07
2018-09
2019-07
2019-07
2019-09
2021-09
2022-06
2022-09
2023-06
Last Updated
15 – 08 – 2023