1977 Canadian Grand Prix
The field arrived in Canada without Niki Lauda who, having clinched the Drivers' Championship at the previous race at Watkins Glen, and having already announced his intention to drive for Brabham in 1978, abruptly quit Ferrari following the team's decision to run a third car for Gilles Villeneuve.
In qualifying, Lotus's Mario Andretti took his sixth pole position of the season, with McLaren's James Hunt alongside him on the front row. Ronnie Peterson was third in his six-wheeled Tyrrell, ahead of Gunnar Nilsson in the second Lotus. The top ten was completed by Jochen Mass in the second McLaren, Patrick Depailler in the second Tyrrell, the Shadows of Alan Jones and Riccardo Patrese, Jody Scheckter in the Wolf, and John Watson in the Brabham. But the safety of the bumpy, high-speed Mosport Park track was in question: during practice Ian Ashley's Hesketh crested one of these bumps on the Mario Andretti straight; it flipped, vaulted the barrier and crashed into a television tower, seriously injuring Ashley and ending his Formula One career. The Englishman survived, but it took 40 minutes to remove him from the car and an additional 30 minutes passed until a helicopter arrived. These problems were underlined later that day when Mass crashed at the first corner into a barrier that flattened upon impact.
At the start of the race, Andretti led away from Hunt, with Mass charging up to third. Andretti and Hunt then proceeded to pull away from the rest of the field, such that by three-quarter distance, they were coming up to lap third-placed Mass. As they did so, Hunt pulled ahead of Andretti, only to collide with his McLaren team-mate after a misunderstanding. Unable to continue, a visibly furious Hunt waved his fist at Mass, before punching a marshal who was trying to usher him away. He was subsequently fined $2,750. Gilles Villeneuve made his debut with Ferrari at this race and started seventeenth after a qualifying crash leading into Moss corner. He had risen to eighth place before spinning in Moss corner on lap 72, dropping back to tenth.
There was drama in the final four laps. On lap 77, Andretti's engine blew and laid oil in turn 9 as he pulled into the pits. Patrese spun his Shadow in the turn 9 oil and into the second Hesketh of Rupert Keegan, which had crashed earlier in the race and had been left on the side of the track. Vittorio Brambilla then hit the oil and also spun his Surtees, collecting the wreckages of Keegan's and Patrese's cars. Danny Ongais was next in the Interscope Penske, but was able to continue. Finally Villeneuve spun, staying on the track only to break a driveshaft trying to pull away and retiring. 
Andretti's retirement meant that Scheckter inherited the win, with Depailler second and the recovered Mass completing the podium. Jones was fourth ahead of Patrick Tambay in the Ensign, while Brambilla was classified sixth, just ahead of Ongais.
|2||4||Patrick Depailler||Tyrrell-Ford||80||+ 6.77||6||6|
|3||2||Jochen Mass||McLaren-Ford||80||+ 15.76||5||4|
|4||17||Alan Jones||Shadow-Ford||80||+ 46.69||7||3|
|5||23||Patrick Tambay||Ensign-Ford||80||+ 1:03.26||16||2|
|7||14||Danny Ongais||Penske-Ford||78||+2 Laps||22|
|8||9||Alex Ribeiro||March-Ford||78||+2 Laps||23|
|10||16||Riccardo Patrese||Shadow-Ford||76||Spun Off||8|
|Ret||3||Ronnie Peterson||Tyrrell-Ford||34||Fuel Leak||3|
|Ret||12||Carlos Reutemann||Ferrari||20||Fuel System||12|
|Ret||8||Hans-Joachim Stuck||Brabham-Alfa Romeo||19||Engine||13|
|Ret||7||John Watson||Brabham-Alfa Romeo||1||Suspension||10|
|DNS||25||Ian Ashley||Hesketh-Ford||Driver Injured|
- Lap leaders: Mario Andretti 77 laps (1–60, 62–78); James Hunt 1 lap (61); Jody Scheckter 2 laps (79–80).
- Final Formula One entry for Ian Ashley.
- Final Formula One podium finish for Jochen Mass.
- This was the only race of the 1977 season in which Ferrari failed to score.
- This was the final Canadian Grand Prix held at Mosport. For 1978, the race would move to the Circuit Île Notre-Dame in Montreal, where it has been held ever since.
- This was Walter Wolf Racing's final Formula One victory.
- This was also the last race won by a non-European constructor before Jenson Button won with Honda in 2006 Hungarian Grand Prix.
Championship standings after the race
- Note: Only the top five positions are included for both sets of standings. Only the best 8 results from the first 9 races and the best 7 results from the remaining 8 races were retained. Numbers without parentheses are retained points; numbers in parentheses are total points scored.
- "Weather information for the "1977 Canadian Grand Prix"". The Old Farmers' Almanac. Retrieved 2013-06-26.
- "1977 Canadian Grand Prix Entry list".
- "1977 - Canadian Grand Prix". Archived from the original on 2013-07-13. Retrieved 2013-07-10.
- "Controversial collisions". Top 10 – ESPNF1.com. Retrieved 23 June 2012.
- "Danny Ongais - Biography". Archived from the original on 2013-07-01. Retrieved 2013-06-24.
- "1977 Canadian Grand Prix". formula1.com. Archived from the original on 21 October 2014. Retrieved 23 December 2015.
- "Canada 1977 - Championship • STATS F1". www.statsf1.com. Retrieved 14 March 2019.
1977 United States Grand Prix
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1977 Japanese Grand Prix
1976 Canadian Grand Prix
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1978 Canadian Grand Prix