After one of the most treacherous and frightening grand prix of all time, John Surtees emerged victorious as only seven cars made it to the finish line.
Having qualified on pole, Surtees took an early lead as chaos ensued behind him. A torrential downpour just three miles in saw Jo Bonnier, Mike Spence, Jo Siffert and Denny Hulme all go off. Jochen Rindt spun at the Masta Kink but continued, others were not so fortunate.
Jackie Stewart, Graham Hill and Bob Bondurant all lost control at exactly the same place as Rindt. Bondurant's car overturned but he escaped with cuts and bruises. Hill's car was undamaged, but he stopped to try and help Stewart, who was trapped in his upturned car in the basement of a farm building, covered with petrol and suffering from a broken shoulder and a cracked rib.
It took Hill and Bondurant 25 minutes to extract Stewart. Rindt briefly passed Surtees for the lead but Surtees, having proved not only skillful but supremely brave in the early laps, got back past as the track finally began to dry and held out for victory.