On Jan. 9, 1965, half an unnamed mountain plunged down the Hope-Princeton highway bringing with it 46 million cubic metres of rock, earth, snow and trees. When it was finished, four people were dead, a valley and a lake were wiped out, and three kilometres of highway was destroyed.
BC history blogger Eve Lazarus has written about it here: https://evelazarus.com/the-hope-slide-of-1965/
