Trans-Canada Air Lines Flight 810-9, a Canadair North Star, crashes near Hope, British Columbia, Canada, killing all 62 people on board.

Trans-Canada Air Lines Flight 810-9 was a Canadair North Star on a scheduled flight from Vancouver to Calgary. The plane crashed into Mount Slesse near Chilliwack, British Columbia, Canada, on 9 December 1956 after encountering severe icing and turbulence over the mountains. All 62 people on board died, making it one of the deadliest airline crashes ever as of that date; it still ranks as the sixth deadliest air disaster in Canadian history.

The Canadair North Star is a 1940s Canadian development, for Trans-Canada Air Lines (TCA), of the Douglas DC-4. Instead of radial piston engines used by the Douglas design, Canadair used Rolls-Royce Merlin V12 engines to achieve a higher cruising speed of 325 mph (523 km/h) compared with the 246 mph (396 km/h) of the standard DC-4. Requested by TCA in 1944, the prototype flew on 15 July 1946. The type was used by various airlines and by the Royal Canadian Air Force (RCAF). It proved to be reliable but noisy when in service through the 1950s and into the 1960s. Some examples continued to fly into the 1970s, converted to cargo aircraft.

Hope is a district municipality at the confluence of the Fraser and Coquihalla rivers in the province of British Columbia, Canada. Hope is at the eastern end of both the Fraser Valley and the Lower Mainland region, and is at the southern end of the Fraser Canyon. To the east, over the Cascade Mountains, is the Interior region, beginning with the Similkameen Country on the farther side of the Allison Pass in Manning Park. Located 154 kilometres (96 mi) east of Vancouver, Hope is at the southern terminus of the Coquihalla Highway and the western terminus of the Crowsnest Highway, locally known as the Hope-Princeton, where they merge with the Trans-Canada Highway. Hope is at the eastern terminus of Highway 7. As it lies at the eastern end of the Fraser Valley in the windward Cascade foothills, the town gets very high amounts of rain and cloud cover – particularly throughout the autumn and winter.