IMSA - International Motor Sport Association

1975

2 February 1975 - Daytona 24 Hours

1976

1 February 1976 - Daytona 24 Hours

20 March 1976 - Sebring 12 Hours

2 May 1976 - Laguna Seca 100 Miles

3 October 1976 - Laguna Seca 100 Miles II

1977

6 February 1977 - Daytona 24 Hours

19 March 1977 - Sebring 12 Hours

17 April 1977 - Road Atlanta 100 Miles

1 May 1977 - Laguna Seca 100 Miles

15 May 1977 - Mid-America 100 Miles

1978

5 February 1978 - Daytona 24 Hours

18 March 1978 - Sebring 12 Hours

2 April 1978 - Talladega 6 Hours

16 April 1978 - Road Atlanta 100 Miles

30 April 1978 - Laguna Seca 100 Miles

7 May 1978 - Hallett 100 Miles

29 May 1978 - Lime Rock 100 Miles

18 June 1978 - Brainerd 100 Miles

4 July 1978 - Daytona 250 Miles Paul Revere

30 July 1978 - Sears Point 100 Miles

6 August 1978 - Portland 100 Miles

27 August 1978 - Mid Ohio 250 Miles

4 September 1978 - Road Atlanta 100 Miles

26 November 1978 - Daytona Finale 250 Miles

1979

4 February 1979 - Daytona 24 Hours

17 March 1979 - Sebring 12 Hours

8 April 1979 - Road Atlanta 100 Miles

22 April 1979 - Riverside 6 Hours

29 April 1979 - Laguna Seca 100 Miles

13 May 1979 - Hallett 100 Miles

28 May 1979 - Lime Rock 100 Miles

17 June 1979 - Brainerd 100 Miles

4 July 1979 - Daytona Paul Revere 250 Miles

15 July 1979 - Mid-Ohio 250 Miles

29 July 1979 - Sears Point 100 Miles

5 August 1979 - Portland 100 Miles

2 September 1979 - Road America 500 Miles

23 September 1979 - Road Atlanta 100 Miles

25 November 1979 - Daytona Finale 250 Miles

1980

3 February 1980 - Daytona 24 Hours

22 March 1980 - Sebring 12 Hours

13 April 1980 - Road Atlanta 100 Miles

27 April 1980 - Riverside 5 Hours

4 May 1980 - Laguna Seca 100 Miles

26 May 1980 - Lime Rock 1.5 Hours

27 July 1980 - Sears Point 100 Miles

3 August 1980 - Portland 100 Miles

17 August 1980 - Mosport 6 Hours

31 August 1980 - Road America 500 Miles

21 September 1980 - Road Atlanta 50 Miles - Heat 1

21 September 1980 - Road Atlanta 50 Miles - Heat 2

12 October 1980 - H. P.-Joisten-Trophy Zolder

30 November 1980 - Daytona Finale 250 Miles

1981

1 February 1981 - Daytona 24 Hours

21 March 1981 - Sebring 12 Hours

26 April 1981 - Riverside 6 Hours

3 May 1981 - Laguna Seca 100 Miles

24 May 1981 - Lime Rock 200 Miles

4 July 1981 - Daytona 250 Miles Paul Revere

26 July 1981 - Sears Point 100 Miles

2 August 1981 - Portland 100 Miles

16 August 1981 - Mosport 6 Hours

23 August 1981 - Road America 500 Miles

13 September 1981 - Road Atlanta 150 Miles

29 November 1981 - Daytona Finale 250 Miles

1982

31 January 1982 - Daytona 24 Hours

20 March 1982 - Sebring 12 Hours

25 April 1982 - Riverside 6 Hours

16 May 1982 - Charlotte 500 km

3 July 1982 - Daytona 250 Miles Revere

11 July 1982 - Brainerd 200 km

1 August 1982 - Portland 100 Miles

15 August 1982 - Mosport 6 Hours

22 August 1982 - Road America 500 Miles

29 August 1982 - Suzuka 1000 km

5 September 1982 - Mid Ohio 6 Hours

12 September 1982 - Road Atlanta 500 km

26 September 1982 - Pocono 500 Miles

28 November 1982 - Daytona Finale 3 Hours

1983

6 February 1983 - Daytona 24 Hours

27 February 1983 - Miami GP

27 February 1983 - GP Miami IMSA GTO

19 March 1983 - Sebring 12 Hours

10 April 1983 - Road Atlanta 500 km

24 April 1983 - Riverside 6 Hours

1 May 1983 - Laguna Seca 100 Miles

15 May 1983 - Charlotte 500 km

30 May 1983 - Lime Rock 3 Hours

19 June 1983 - Mid-Ohio 6 Hours

3 July 1983 - Daytona 250 Miles Paul Revere

10 July 1983 - Brainerd 500 km

24 July 1983 - Sears Point 3 Hours

31 July 1983 - Portland 3 Hours

14 August 1983 - Mosport 6 Hours

21 August 1983 - Road America 500 Miles

11 September 1983 - Pocono 500 Miles

27 November 1983 - Daytona Finale 3 Hours

1984

5 February 1984 - Daytona 24 Hours

26 February 1984 - Miami 3 Hours

24 March 1984 - Sebring 12 Hours

29 April 1984 - Riverside 6 Hours

6 May 1984 - Laguna Seca 100 Miles

29 July 1984 - Portland 3 Hours

5 August 1984 - Sears Point IMSA GT

26 August 1984 - Road America 500 Miles

25 November 1984 - Daytona Finale 3 Hours

1985

3 February 1985 - Daytona 24 Hours

24 February 1985 - Miami 3 Hours

24 February 1985 - Miami IMSA GTO

23 March 1985 - Sebring 12 Hours

14 April 1985 - Road Atlanta 500 km

28 April 1985 - Riverside 600 km

5 May 1985 - Laguna Seca 300 km

19 May 1985 - Charlotte 500 km

27 May 1985 - Lime Rock 2 Hours

9 June 1985 - Mid Ohio 500 km

7 July 1985 - Watkins Glen 3 Hours

28 July 1985 - Portland 300 km

4 August 1985 - Sears Point 300 km

25 August 1985 - Road America 500 Miles

8 September 1985 - Pocono 500 km

29 September 1985 - Watkins Glen 500 km

5 October 1985 - Columbus IMSA GT

6 October 1985 - Columbus 500 km

1 December 1985 - Daytona Finale 3 Hours

1986

2 February 1986 - Daytona 24 Hours

2 March 1986 - Miami GP IMSA GTO

2 March 1986 - Miami Grand Prix

22 March 1986 - Sebring 12 Hours

5 April 1986 - Road Atlanta IMSA GTO

6 April 1986 - Road Atlanta 500 km

27 April 1986 - Riverside 6 Hours

4 May 1986 - Laguna Seca IMSA GT

4 May 1986 - Laguna Seca 300 km

17 May 1986 - Chartlotte IMSA GTO

18 May 1986 - Charlotte 500 km

26 May 1986 - Lime Rock 150 laps

8 June 1986 - Mid Ohio 500 km

8 June 1986 - Mid-Ohio 250 km IMSA GTO

22 June 1986 - West Palm Beach IMSA GTO

22 June 1986 - West Palm Beach 3 Hours

6 July 1986 - Watkins Glen 500 Miles

27 July 1986 - Portland 300 km

3 August 1986 - Sears Point 300 km

24 August 1986 - Road America 500 Miles

1 September 1986 - Lime Rock IMSA GTO

20 September 1986 - Watkins Glen 500 km GT

21 September 1986 - Watkins Glen 500 km

5 October 1986 - Columbus 500 km

5 October 1986 - Columbus IMSA GT

26 October 1986 - Daytona Finale 3 Hours

1987

1 February 1987 - Daytona 24 Hours

1 March 1987 - Miami 3 Hours

21 March 1987 - Sebring 12 Hours

12 April 1987 - Road Atlanta 500 km

26 April 1987 - Riverside 500 km

3 May 1987 - Laguna Seca 300 km

24 May 1987 - Lime Rock 150 laps

7 June 1987 - Mid Ohio 500 km

7 June 1987 - Mid-Ohio 250 km IMSA GTO

21 June 1987 - West Palm Beach 3 Hours

5 July 1987 - Watkins Glen 500 km

26 July 1987 - Portland 300 km

2 August 1987 - Sears Point 300 km

16 August 1987 - Road America 500 Miles

6 September 1987 - San Antonio 3 Hours

4 October 1987 - Columbus 300 km

4 October 1987 - Columbus IMSA GT

25 October 1987 - Del Mar 2 Hours

1988

31 January 1988 - Daytona 24 Hours

28 February 1988 - Miami 3 Hours

19 March 1988 - Sebring 12 Hours

10 April 1988 - Road Atlanta 500 km

24 April 1988 - West Palm Beach 3 Hours

30 May 1988 - Lime Rock 150 laps

5 June 1988 - Mid Ohio 500 km

3 July 1988 - Watkins Glen 500 km

17 July 1988 - Road America 500 km

31 July 1988 - Portland 300 km

14 August 1988 - Sears Point 300 km

4 September 1988 - San Antonio 3 Hours

2 October 1988 - Columbus 300 km

23 October 1988 - Del Mar 2 Hours

1989

5 February 1989 - Daytona 24 Hours

5 March 1989 - Miami 3 Hours

18 March 1989 - Sebring 12 Hours

30 July 1989 - Portland 300 km

3 September 1989 - San Antonio 2 Hours

1990

4 February 1990 - Daytona 24 Hours

17 March 1990 - Sebring 12 Hours