The Hope Slide was one of the largest landslides ever recorded in Canada. It occurred in the morning hours of 9 January 1965. An earlier, small avalanche had forced four people to stop their vehicles a few miles southeast of the town of Hope, British Columbia (two hours east of Vancouver), on a stretch of the Hope-Princeton Highway below Johnson Peak. As those people contemplated waiting for clearing crews or turning around, a small earthquake below the mountain triggered the main slide, which obliterated the mountain's southwestern slope.

The slide buried the victims and their vehicles under a torrent of pulverized rock, mud, and debris 85 metres (nearly 300 feet) thick and 3 kilometres (about 2 miles) wide, which came down the 2000-metre (6000-foot) mountainside, consumed a lake, rode up the other side of the valley, and then rebounded again to slosh up the original slope before settling. Rescue crews only found two of the four dead¡ the others have remained entombed in the rock, with their cars, since 1965.