Track Trends
| Year | Start | End | Days | Races | Avg. Att. | Avg. Han. |
| 1966 | September 12 | October 1 | 18 | 162 | 3,608 | 229,841 |
| 1967 | September 11 | September 30 | 18 | 156 | 3,915 | 252,582 |
| 1968 | September 9 | September 28 | 18 | 162 | 4,089 | 293,232 |
| 1969 | September 8 | September 27 | 18 | 162 | 3,995 | 286,745 |
| 1970 | September 14 | October 3 | 18 | 157 | 3,873 | 264,841 |