From: east coast, usa
Such an interesting mystery. Imagine the terror that these nine people experienced in the middle of a desolate Urals landscape that dreadful night in -40º temperatures and 60mph winds.
[Excerpts from the WIki article at: https://en.wikipedia.org/wiki/Dyatlov_Pass_incident ]
Each member of the group was an experienced Grade II-hiker with ski tour experience, and would be receiving Grade III certification upon their return. At the time, this was the highest certification available in the Soviet Union, and required candidates to traverse 300 kilometers (190 mi).
So they weren't beginner's making rookie mistakes. They knew what they were doing. Yet, they 'got lost' and veered west and camped in an area undesirable for camping, especially in the weather conditions. Did any of the diaries or letters that they left behind confirm that they had gotten lost? Or maybe they were in fact moving away from or around something. A guess that they got lost is just as good as a guess that they were being followed. It is actually a very compelling position, that rather than camp in an area safer from the weather such as the woods, that they would rather camp in the open because they were more afraid of something in the woods. [However, as a camper myself I might rather stay out of the woods during 60mph winds in order to avoid getting clobbered by falling trees].
At the time the verdict was that the group members had all died because of a compelling natural force. The inquest officially ceased in May 1959 as a result of the absence of a guilty party. The files were sent to a secret archive.
So really no explanation and the files were secreted away. There was an active military base nearby [see the 'Military tests' section of the Wiki article], so this seems the most probable cause of the incident. A tragic military accident similar to the one where people were killed by an EMP test because they accidentally helicoptered over the wrong area, or where a plane was shot down accidentally by the navy due to coordinate/altitude confusion. Wrong place, wrong time.
Eight or nine sets of footprints, left by people who were wearing only socks or a single shoe or were even barefoot, could be followed, leading down towards the edge of a nearby woods ... only the hikers' footprints were visible ... all the footprints leading away from the tent and towards the woods were consistent with individuals who were walking at a normal pace.
All of this indicates that the nine were by themselves and of NOT SOUND MIND. What could make NINE experienced people make irrational life threatening decisions all at the same time? [It was reported that the investigation found no drugs]. One thing I've never seen mentioned in any report or investigation of the site is any evidence of a defense. No mention of protective weapons carried by any of the group. This is curious because evidence of weapons and/or defense could give an indication of being afraid of something, or if there is no such evidence then the indication is in fact that all nine lost their senses at or around the same time.
As a camper myself I once signed up for a 'winter certification' camping trip. This was at an abandoned quarry area nick-named 'Moon Base' where the winter weather conditions were typically rough with temps in the 20's and up to 30mph winds. Not near as severe as what the Dyatlov party experienced, but it gave an idea of how things are in that type of situation. There were some issues and disagreements, but nobody ended up outside at 3 in morning in their underwear. That is why I said at the top here, that I can't imagine the terror experienced that night.