- Mexican Grand Prix
- Surtees ends turbulent year with victory
October 23, 1966: John Surtees finished a remarkable yo-yo season with victory at the Mexican Grand Prix.
- United States Grand Prix
- Clark finally wins in '66
October 2, 1966: Jim Clark finally overcame the unreliability of his Lotus to win the US Grand Prix at Watkins Glen, although it was not a complete success for the Norwich team as the car had an old engine borrowed from rivals BRM.