From the devastating 1970 Huascarán collapse in Peru to recent incidents in the United States, avalanches have claimed thousands of lives. The following list ranks the deadliest events ever documented.
On May 31, 1970, a 7.8‑meter earthquake triggered a massive ice‑and‑rock slide from Mount Huascarán. The avalanche slammed into the town of Yungay, burying it under a wall of snow and debris.
Official estimates place the death toll between 15,000 and 25,000, making it the deadliest avalanche ever recorded.
During World War I, heavy snowfall destabilized slopes in the Alps. On December 13, 1916, multiple snow slides caused an estimated 2,000 casualties, standing as one of the most deadly mountain disasters of the era.
Near Stevens Pass in Washington state, two trains were stranded during a powerful storm. An overnight avalanche swept the railcars into a gorge, killing 96 people and marking the deadliest avalanche in U.S. history.
During the Klondike Gold Rush, a slide along the Chilkoot Trail buried prospectors heading north. More than 60 lives were lost, making it one of the worst natural disasters of the gold rush era.
A series of slides struck the village of Blons after heavy snowfall, burying homes and the town’s center. Sixty‑seven residents perished, making it one of Europe’s most deadly alpine disasters.
An avalanche near the village of Galtür roared down at high speed after extreme weather conditions. Thirty‑one people were found dead, prompting the expansion of avalanche defenses and updated hazard zoning practices across the region.
Heavy snowfall and seismic activity preceded a slide that buried a mountain hotel. Twenty‑nine people were killed, and search and rescue crews worked days in hazardous conditions to recover victims and rescue survivors.
Ten climbers and a guide were killed near the Ingraham Glacier on Mount Rainier. While several were rescued, some remains remain missing, making it one of the deadliest mountaineering accidents in recent U.S. history.
In the Castle Peak area near Soda Springs and Lake Tahoe, an avalanche killed at least eight backcountry skiers during a winter storm. Authorities—including the Nevada County Sheriff’s Office and search and rescue teams—responded as the Sierra Avalanche Center warned of unstable snowpack in the Sierra Nevada.
On March 31, 1982, a California avalanche struck Alpine Meadows Ski Resort near Lake Tahoe in the Sierra Nevada. Seven people were killed after snow swept buildings and lift areas.
These tragedies underscore the importance of avalanche science, real‑time monitoring, and public awareness. Advances in forecasting, early warning systems, and building codes have dramatically reduced fatalities in recent decades, yet each event reminds us that nature’s power demands respect and preparedness.
