Canada has a wide range of landslides reflecting the diverse geological and geomorphological environments in the nation's landscape. Rock avalanches and rockfalls are extremely rapid landslides that are common in mountainous regions. Debris avalanches and channelized debris flows, typically triggered by heavy rains, form another group of rapid landslides. Rapid slides and earthflows (flowslides) in Quaternary sediments include landslides in leda clay of the St. Lawrence Lowland. Slumps and earthflows are slow landslides. Landslides occur in permafrost terrain and are sensitive to environmental change. Geotechnical failures in waste dumps, embankments, and excavated slopes form an important group of damaging landslides. Underwater slides are common in Canada's lakes and ocean margins. The secondary effects of landslides (landslide dams and landslide-generated displacement waves) extend the impact of a landslide beyond its debris. Landslides have caused significant loss of life in Canada and have had impacts on Canada's infrastructure, environment, and resources.