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The ten hikers set off on their planned 22 day trek from the city of Sverdlovsk.
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Five days into the hike, one of the members, Yuri Yudin, falls ill and turns back to return home. The nine others continue on.
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The hikers set up their tent on the side of Holatchal mountain. They plan to continue on to mount Otorten in the morning.
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Early in the morning, an unknown force causes the hikers to flee their tent into the frigid darkness. All nine hikers died within a couple hours.
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The hikers are expected to return back home on this date.
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Relatives of the hikers begin to worry, and pressure authorities to instigate a police search.
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A formal search for the missing hikers begins. A criminal investigation is also ordered.
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During this lengthy search, all the bodies were disovered, and their clothing and items were taken to be analyzed. No real conclusion was made over the cause of their deaths.
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During a lengthy search process that lasted until May 4th, the bodies of the hikers are eventually discovered. They died at varying distances from the tent, and some were under feet of snow. Most perished from hypothermia, but others had strange, traumatic injuries that couldn't be explained.
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The criminal case is discontinued, and "an unknown, compelling force" was left responsible for their deaths. The details of the case were unavailable to the public until 1992.
