Schedule
The 13 championship races each counted towards one or more of the five divisions.
| IMC | ISCC S1 |
ISCC S2 |
ISCC S3 |
Race | Circuit or Location | Date |
|---|---|---|---|---|---|---|
| R 1 | - | R 1 | R 1 | 24 Hours of Daytona | Daytona International Speedway | February 5 February 6 |
| R 2 | R 1 | R 2 | R 2 | 12 Hours of Sebring | Sebring International Raceway | March 26 |
| R 3 | - | R 3 | R 3 | 1000km Monza | Autodromo Nazionale Monza | April 25 |
| R 4 | R 2 | R 4 | R 4 | Targa Florio | Palermo | May 8 |
| R 5 | - | R 5 | R 5 | 1000km Spa | Circuit de Spa-Francorchamps | May 25 |
| R 6 | R 3 | R 6 | R 6 | 1000km Nürburgring | Nürburgring | June 5 |
| R 7 | - | R 7 | R 7 | 24 Hours of Le Mans | Circuit de la Sarthe | June 18 June 19 |
| - | R 4 | - | - | Mugello 500 km | Mugello Circuit | July 17 |
| - | R 5 | - | - | Coppa Citta di Enna | Autodromo di Pergusa | August 7 |
| R 8 | - | R 8 | - | Hockenheim 500 km | Hockenheimring | August 14 |
| - | R 6 | R 9 | R 8 | Grosser Bergpreis der Schweiz | Crans-Montana | August 28 |
| - | R 7 | - | - | 500 km Nürburgring | Nürburgring | September 4 |
| - | R 8 | R 10 | R 9 | Austrian Sports Car Grand Prix | Zeltweg Airfield | September 11 |
Note: The Hockenheim 500 km race did not count towards the Over 2000cc division of the International Manufacturers Championship.
Read more about this topic: 1966 World Sportscar Championship Season