Canada’s deadliest road accident to date was a single-vehicle bus crash near Saint-Joseph-de-la-Rive, in the Quebec municipality of Les Éboulements, on Thanksgiving Day, 13 October 1997.
A bus, filled with senior citizens on an autumn colours tour, suffered brake failure while descending a steep hill. It missed a curve, crashed through the guardrail and toppled into a stony ravine, killing 44 people and injuring four (there were initially five injured, but one later died from their wounds).
A similar tragedy had occurred at the same spot in 1974, resulting in 13 deaths.
See also Motor Vehicle Disasters in Canada.