The 1971 Canadian Grand Prix was won by Jackie Stewart of Tyrrell.
The race in Canada was round 10 of 11 of the 1971 season.
The 1971 Canadian Grand Prix was a Formula One motor race held at Mosport Park on September 19, 1971. It was race 10 of 11 in both the 1971 World Championship of Drivers and the 1971 International Cup for Formula One Manufacturers. Jackie Stewart took the win in the awful conditions and the race was stopped after 64 laps due to the weather. American Mark Donohue scored an excellent third on his F1 debut.
This was the first ever Formula One race to be red flagged.
source: Wikipedia
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