Mystery at Dyatlov Pass

A look at one of the most bizarre cases in Russian cross country skiing history.

by Brian Dunning

Filed under Aliens & UFOs, Ancient Mysteries, Urban Legends

Skeptoid #108
July 8, 2008
Podcast transcript | Listen | Subscribe
Also available in Chinese | Russian

February, 1959, the Ural Mountains in Russia - Ten young cross country skiers from the Ural Polytechnical Institute, eight guys and two girls led by Igor Dyatlov, set out for two weeks of adventure. One became ill and turned back: Little did he know he would be the only one to return alive. Weeks later, searchers found one of the most bizarre scenes in modern lore. The bodies of the nine victims were scattered over a wide area of the frozen landscape. Some were wearing only their underwear. Some were wearing each others' clothes. Two had head injuries. One had no tongue. Two had severe internal chest injuries. None had any visible external signs of trauma. Some of their clothes were found to be radioactive. Circumstances suggested that some the victims may have been blind. Various other witnesses in the region reported bizarre orange spheres in the night sky; and strangest of all, the bodies had orange skin and gray hair.

This was the Soviet Union in the middle of the cold war, and few details other than what I just gave were reported. Journalists attempting to give more information found their books and articles censored. Independent investigators found official records to be missing or classified. Many fingers have pointed at military testing. Did radioactivity from some secret weapons test drive the group insane? Some people think UFOs are responsible for the deaths, citing the reports from other skiers in the region who saw the orange spheres in the night sky in the direction of the Dyatlov party. Russian authorities closed the case, called the cause of death a "compelling unknown force", and classified it top secret. The mountain was renamed Dyatlov Pass. And that's about all that anyone's ever been able to learn about the case.

I found some translated articles from Russian media and some western articles, and although the case offers some really compelling mysteries, it also offers an elephant in the room: The possibility of avalanches being the culprit. I wanted to see how likely avalanches would have been in that area, so I looked it up on Google Earth. Turns out it's hardly the type of place you'd expect avalanches. The hills are low and rounded, much better for cross country skiing than for avalanches, at least according to my personal informal assessment from looking at the terrain on Google Earth. And, obviously, the group felt comfortable enough with any potential danger to make camp where they did. But I also found a Russian tourism brochure for the area that warns of avalanche danger on slopes steeper than 15°. According to the police reports, the slope immediately above the campsite was at 22-23°, and 50 to 100 meters above the campsite it increased to 25-30°. That's quite steep. There was a cornice, and the snow at the campsite was 2 meters deep. There has also been much discussion in the Russian press about the possible role of avalanches in the Dyatlov Pass incident. So I'm going to go ahead and call avalanches a plausible factor in the tragedy.

A number of skeptics have addressed the question of radioactivity by pointing out that the mantles used in camping lanterns contain thorium, which emits alpha particle radiation, to the point that there is actually a radiation warning on the packaging. These mantles, if you're not familiar with them, are little fabric bags that serve as the wick in a burning lantern. They're quite fragile and easily turn to dust that gets everywhere, like onto the clothes of everyone in the tent, when you replace them, which you need to do pretty regularly. Thorium gas mantles were invented in 1891 and were manufactured in many countries for a long time. Coleman, the largest US manufacturer, only phased them out in the 1990's. I found a blog comment signed "Igor", a guy who says he's Russian and went to the same college as the Dyatlov Pass victims, and he states in his comment that thorium gas mantles were not available in Russia in 1959. That doesn't sound consistent with general articles on the subject, plus I found a Russian WWII lantern on eBay that was kerosene fueled, and all the kerosene lanterns I could find details on do use thorium gas mantles. It's a question mark, and remains a plausible possibility in my book.

Here is my proposed explanation of what happened. It's wrong, of course, because it's done from my armchair 50 years after the fact and with no firsthand knowledge of the region, but it's completely reasonable and does adequately satisfy the facts as we know them. Nine skiers set up camp in an area with potential avalanche danger, but no more or less danger than would have been found if they set up anywhere else they could have reached before nightfall. Sometime during the night, a loud noise, either from a nearby avalanche, a jet aircraft, or military ordnance, convinced at least five members of the group that an avalanche was bearing down on them. They burst out of the tent wearing whatever they happened to be sleeping in and ran. At some point one of them fell and struck his head on a rock. They became lost in the dark and poor visibility, or simply found themselves stranded with their injured friend, and finally built a fire. They quickly got hypothermia and probably shouted themselves hoarse for their friends. Two of them lost consciousness and the others made a desperation decision: To take what little clothes their two unconscious buddies had and risk it all to try and make it back to camp. One made it 300 meters, the second made it 480, and the third a full 630 meters before all five were dead from hypothermia. Back at camp, the four who didn't panic and run away in the night got dressed, collected provisions, and began to search for their friends. They searched for hours, circling high and low, until at some point either through a slip or just bad luck, they were caught in a real avalanche. During the resulting turmoil one received a fatal skull fracture, one received twelve broken ribs, and one bit her tongue off, all perfectly plausible injuries during such a traumatic death. Their bodies remained buried until the spring thaw, as is so common with avalanche victims. At the open-casket funeral for the first five victims, relatives saw the combination of five days of winter sunburn in those days before sunscreen, and the mortician's effort to cover up frostbite and a full month of exposure to the elements, and described it as a strange orange color; though others described it simply as a deep tan, which is consistent with reasonable expectations. And who knows what hair would have looked like after all that exposure and who knows what kind of treatment done by the mortician, so I can't assign too much significance to what amounts to a few anecdotal reports from some funeral attendees, and not even all funeral attendees. Plus I'm quite certain that if UFOs had turned all of their hair really gray, don't you think the cold war Russian authorities would have had it colored back to normal for an open casket funeral? Their bodies had been exposed outdoors for weeks. Of course they looked terrible.

What of the radiation on their clothes? Well, there is at least as much uncertainty about what the Russians were doing with their atomic and thermonuclear weapons in that area in those days, as there is about exactly what type of radiation and how much was found on the Dyatlov pass victims. Since we don't know anything about either, we can't say that any explanation is inconsistent with what was found. And, the thorium lantern mantle question quite probably makes the entire radiation issue a moot point. Assuming they'd changed a lantern mantle sometime during the trip, which nearly always has to be done, there's every reason to expect to find low-level alpha radiation on the clothes of anyone who participated.

How about those UFO reports? Well, people all around the world report UFOs every day, and whether anything happened to the Dyatlov party or not, it's not especially surprising that skiers in the Ural Mountains saw UFOs that night. What did that have to do with the Dyatlov party? We have a statistically insignificant correlation, with a sample size of one, and no reason to suspect that one thing had anything to do with the other. Human psychology encourages us to think anecdotally and assume a causal relationship, but for my money, I consider the UFO question irrelevant. Maybe if the UFOs were identified, and known to have some specific physical capability, then we'd have something to talk about.

The Russian newspaper reports stating that the victims may have been blinded appears to be pure speculation, based only on two observations: first, that some of them were wearing the wrong clothes; and second, that when they built their campfire they didn't use some dry wood nearby. Is it really necessary to conclude that blindness, ostensibly caused by UFOs, is the most likely explanation for the choice of firewood? Five panicked young people, underdressed, in subzero temperatures in near-zero-visibility darkness, were lucky to get a fire built at all. I think we can cut them a little slack on what firewood they were able to find.

Summary: I'm still looking for something in the Dyatlov Pass mystery that lacks a simple and mundane explanation.

Tip Skeptoid $2/mo $5/mo $10/mo One time

Brian Dunning

© 2008 Skeptoid Media Copyright information

References & Further Reading

Adams, C. "Are Camp Lanterns Radioactive?" The Straight Dope. Creative Loafing Media, Inc., 5 Dec. 2003. Web. 12 Jan. 2010. <>

Angelo, J. Nuclear Technology. Westport: Greenwood Press, 2004. 230.

Giesbrecht, G., Wilkerson, J. Hypothermia Frostbite and Other Cold Injuries, Prevention, Survival, Rescue, and Treatment, Second Edition. Seattle: The Mountaineers, 2006. 38-56.

Maynard, C. The Ural Mountains. New York: PowerKids Press, 2004.

Osadchuk, S. "Mysterious Deaths of 9 Skiers Still Unresolved." The St. Petersburg Times. 19 Feb. 2008, Issue 1349, Number 13.

Wedin, B., Vanggaard, L., Hirvonen, J. "Paradoxical Undressing in Fatal Hypothermia." Journal of Forensic Science. 1 Jul. 1979, Volume 24, Number 3: 543-553.

Reference this article:
Dunning, B. "Mystery at Dyatlov Pass." Skeptoid Podcast. Skeptoid Media, 8 Jul 2008. Web. 29 Aug 2015. <>


10 most recent comments | Show all 310 comments

I have thought of the unfortunate and unexplained deaths of these students for some time and as Spock said in Star Trek - quoted from Sherlock Holmes "... when you have eliminated the impossible, whatever remains, however improbable, must be the

I originally thought that it may have been the Russian Army with concussion bombs that were dropped on them by accident.
The Army had used this location for secret tests.
Some mention that the Army secretly arrived at the crime scene 1 week before the rescuers found the bodies.

This could answer a few of the mysteries but not all!

Why their tent was on the side of the mountain and not logically down at the tree line for shelter and fire wood?
The Army could have moved the tent up the mountain to change the crime scene.

Why there was radioactive material on some of the clothing and why they were not wearing any protective clothes for the harsh climate?
The Army could have changed their clothes and confiscated clothing which showed being radioactive.

Though all good explanations, I do believe there is only one explanation that holds up to all the facets of this case!

Yeti or Abominable Snow Man - Encounter!

On research I found that the small tent used was not their main tent.
They had left supplies at a base camp and were using this very small tent for an excursion.

What was their purpose for climbing the Ural mountain range?
I googled Russian news broadcast for the past year (1958) and found an interesting account of Yeti encounters on this range. That year a number of local Mansi tribe people disappeared.
After an investigation, the Russian Government banned all further reporting on the Yeti with threats of incarceration.


Robot, Prince George, BC
March 3, 2014 4:44pm

Re the cuts in the tent: Imagine being asleep in the tent - lying length ways. If the tent collapses on your face, the logical way to cut your way out would be from your head towards your feet. When the tent is stood up, it would look like a horizontal gash.

Been there done that ! (not in Russia, just in a collapsed tent)

Aussie, Melbourne
March 16, 2014 11:31pm

Both hypothermia and extreme high altitude (say, a mile or more) can cause or contribute to mental confusion (similar putting away a pint of vodka.)

So can putting away a pint of vodka.

Given this incident is so poorly reported and distorted by time and gossip, I think that UFOs and military conspiracies are equally unlikely.

Without some concrete evidence to the contrary I believe this can be assigned the status of a terrible tragedy due to personal errors and/or extreme conditions and should be mourned for the loss of the sons and daughters and friends of the families, no turned into just another media circus equal to the loss of the 5 pilots who disappeared over the Gulf on a training flight (who were eventually found on the bottom of the Gulf where they as a squad ditched and drowned.)

And, by the way, there is a problem known to intrepid snow fanciers called "whiteout conditions" which may be a factor in the apparent blindness and confusion suggested by the news.

It was terribly sad.

Swampwitch, Gainesville Fl
April 3, 2014 5:53am

in the camera they used has been found the last photo they took.
a wird light in the night sky , don`t forget that the tongue of one girl was missing like parts of cows are missing in strange cases , some strange force as the russians put it back then took the lives of the 9 people.
something is outhere a phenomenon which is real and sometimes can be fatal.

Greek, Athens
July 1, 2014 6:04am

I have studied this subject a lot, including some stuff in russian (a friend translating it ) all I can say is its interesting but i can find no 100% answer as to what happened. But I would put my money on some sort of weapons testing. A lot of things like that happened in the old USSR.

domi, Finland
July 1, 2014 9:43am

A bit of an update from my end.
I saw a so-called documentary on H2 the other night about Dyatlov, in an episode of Ancient Aliens.
Now they're blaming (gulp!) Bigfoot. I think the local natives in the area call it a Mansi - or something like that.

Apparently one of the hikers sliced a hole in the tent and got a photo of a large, hairy, half-human thing glaring at them from behind a tree; and then it decided to trash the camp and kill them all.

The local natives "believe in" this thing, and weren't too surprised about what happened to the hikers.

As usual, the episode was entertainment, not information; but my only reaction was that if it's true (highly doubtful) then it's too bad the Rooshians don't have a 2nd Amendment so that they could have defended themselves and maybe got some physical proof with a carcass.

Just thought I'd mention it.

Ron, Calgary Alberta Canada
January 15, 2015 4:29pm

I think it's pretty obvious if we assess the situation honestly that the one guy who 'got sick' and turned around murdered his friends and left them on the mountain. It's a really, really weak alibi.

No need to posit miniature avalanches that leave no characteristic avalanche signs behind & molest two women when we have a guy who somehow miraculously survives a night where the rest of his party is brutally killed / raped and, golly gosh, he just has no idea who that happened.

Kevin Brown, Qualicum Beach
June 10, 2015 1:28pm

Very interesting stuff.

Group of hikers lose their sh*t (or at least someone does) over some harmless misunderstanding, and everyone ends up killing themselves with various ways. Tucker and Dale vs. Evil anyone?

What a waste.

Aapeli, Finland
June 29, 2015 4:31pm

I think what is important to remember is when the search team found some of the bodies, they did not think their condition was strange at all. They had seen bodies of hikers who died out in the cold Siberian winter so if something were truly amiss, it would have been noted.

The question as to why they placed the tent where they did could possibly be explained by their desire to earn the highest grade certificate in this type of rugged hiking expedition. To camp out in the open would show they could survive even without the relative security of being so close to a nearby forest. Just a guess.

The fellow who turned around and returned home had suffered since childhood from back issues. When he found the pain too much and that he was holding the others back, he decided to just give up before he became a real burden to their progression. No mystery about him. He died believing the Soviet military had something to do with it.

The various conditions of the bodies show nothing more than 1) exposure to the elements and 2) animal predation (i.e., missing tongue). Again no one at the scene seemed overly surprised at this.

But in the end, UFOs or the Yeti will do just fine, even though there is zero proof for either of these explanations. Call it "taking the easy way out".

13th Child, New Jersey
July 14, 2015 8:56am

As a man with a fair (if not extensive) experience of mountaineering, this is just... completely ridiculous, like more than ufo's, they ran, in the night, in the snow,for more than 600m away from a hypothetical avalanche ? when you sleep in a tent on snowy mountains you hear avalanches, its common, you can hear avalanches from some distance so sometimes you hear 3 or 4 a night and they can be loud ! and not once have I cut up my tent to run away in my undies. besides the sound of an avalanche is pretty much unmistakable, also, even in the night they would have realized pretty quickly that they were out of danger, and the their friends were as well, do you have any idea how long it takes to run a half a mile in deep snow ? minutes at best, an avalanche wouldn't have left them 20 seconds, and I refuse to believe they ran for more than a minute with the belief they were outrunning an avalanche.The avalanche theory in my mind is interesting in the sense that it could explain the severe injuries and the lack exterior signs of trauma, trouble is, you can see where there has been an avalanche weeks after it happened(for weeks ,months,or even years) the terrain is uneven, often dead animals, trees out of ground ect, its usually pretty obvious. Oh and since they apparently owned radioactive lamps, why didn't there helpful friends follow their tracks in the snow ?

Colomban, Villars-suur-ollon
August 8, 2015 11:30am

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