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| Circuits | Country | Date |
| Kyalami | South Africa | 1st January 1968 |
| Járama | Spain | 12th May 1968 |
| Monte Carlo | Monaco | 26th May 1968 |
| Spa-Francorchamps | Belgium | 9th June 1968 |
| Zandvoort | Netherlands | 23rd June 1968 |
| Rouen-les-Essarts | France | 7th July 1968 |
| Brands Hatch | Britain | 20th July 1968 |
| Nürburgring | Europe | 4th August 1968 |
| Mont-Tremblant | Canada | 22nd September 1968 |
| Monza | Italy | 8th September 1968 |
| Watkins Glen | USA | 6th October 1968 |
| Mexico City | Mexico | 3rd November 1968 |
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