Oso Landslide Disaster

Date: March 22, 2014 • Location: Skagit County, United States

A massive landslide in Oso, Washington, killed 43 people after engulfing a rural neighborhood, the largest death toll for a standalone landslide in U.S. history.

A major landslide occurred 4 miles (6.4 km) east of Oso, Washington, United States, on March 22, 2014, at 10:37 a.m. local time. A portion of an unstable hill collapsed, sending mud and debris to the south across the North Fork of the Stillaguamish River, engulfing a rural neighborhood, and covering an area of approximately 1 square mile (2.6 km2). Forty-three people were killed and 49 homes and other structures destroyed. The landslide has been described as one of, if not the most, deadly landslide in American history.