Dyatlov Pass incident in 1959,nine hikers died under mysterious circumstances in the Ural Mountains.
In January 1959, a group of nine experienced hikers led by Igor Dyatlov embarked on a trek in the Ural Mountains. On the night of February 2, they set up camp on the slopes of Kholat Syakhl. What followed is a mystery. The group apparently left their tent in a hurry, slashing it open from the inside. Despite freezing temperatures, they were found barefoot, some without proper clothing. The first bodies were discovered in a nearby forest, and others were found between the campsite and the forest.