The Frank Slide occurred on April 29, 1903, when approximately 44 million cubic meters of limestone broke away from Turtle Mountain and crashed down onto the mining town of Frank, Alberta. The landslide buried part of the town within seconds, killing an estimated 70 to 90 people, making it Canada’s deadliest landslide. Contributing factors included unstable geological layers, water infiltration from snowmelt, and coal mining activity that may have further weakened the mountain’s structure. Today, the site serves as a stark reminder of the power of natural disasters and is commemorated by the Frank Slide Interpretive Centre.