On a bitter February night in 1959 in the very far north of the Ural Mountains, in the Soviet Union, a group of nine young hikers became involved in an utterly bizarre and frightening event that has remained one of the biggest unsolved mysteries of the 20th century. The case is now called the Dyatlov Pass and it is still fascinating to historians, researchers, and even conspiracy theorists. The deathly mixture of unfinished evidence, bizarre mutilations and unexplainable actions has given a narrative that is not going away. Even decades of research, documentaries, and scientific investigations cannot answer this question: What did actually happen on that snowy and distant mountain slope.

The Journey Begins

Dyatlov Pass expedition comprised of ten well-trained hikers of the Ural Polytechnic Institute. The group launched out on January 23, 1959, with the 23 year old Igor Dyatlov leading, heading to the peak of Otorten Mountain, a difficult journey even to experienced mountaineers. Team members consisted of the engineering students, sportsmen, and outdoor enthusiasts, all of them were trained in the survival in winter and were interested in gaining a Grade III hiking qualification the highest in Soviet Union at that period.

Their trip to the West was without difficulties. They rode up and down and over by train, truck and skis and established camps along the way and left diaries and photographs which expressed their camaraderie and excitement. One of the members, however, Yuri Yudin, became sick on January 28 and went home. It would be the decision that would save his life. The other nine hikers went on their way not knowing that they would never come back.

The Last Camp

On February 1, the hikers went through a perplexing decision; they could have gone to the protection of an adjoining valley, but instead, they climbed the bare slope of a Kholat Syakhl also known as Dead Mountain by the native Mansi tribesmen. What caused this choice is not quite clear. There are speculations that they got lost in the bad weather and others assume that they deliberately established camp on the slope to train themselves.

The last camp that was discovered by them was just under the mountain peak. The pictures taken by the cameras of the hikers depict them smiling, pitching their tent, and getting ready to sleep. Nobody could have imagined the horror that was going to be experienced in the next few hours.

The Find of the Tent that was Left

On February 20, the hikers did not show up on time and a search party was initiated. Rescuers discovered the tent of the expedition slashed open, half buried in the snow, and uninhabited on February 26. The equipment and other items in the cabin were well organized: boots, jackets, food, and equipment remained. But there were no indications of the hikers themselves.

Tracks of footprints moving out of the tent showed that the hikers had left the tent in different states of undress some with just socks or light clothes even though the temperatures had gone down to below -25°C. Their footprints were so quiet, so law-abiding that they did not appear to be running away in alarm, but were walking steadily on into the fatal night. This was one among a great number of perplexing details:

The First Bodies

Rescuers trailed the tracks down to a forest near at hand. As they approached the tree-line they discovered the traces of a small fire at the root of a great cedar tree. In close proximity were the corpse of Yuri Doroshenko and Georgy Krivonischenko who were only wearing underwear. Their feet and hands were severely frostbitten, and the branches above them were splintered five meters to the air, as though they had clambered desperate to the tree–it might be to see what was there or to get away what was there.

The body of Dyatlov, Zina Kolmogorova and Rustem Slobodin was found at different distances between the cedar and the tent. They were attempting to go back to the tent. Slobodin was struck on the head, but not crippled enough to kill him on the spot, and all three were affected by hypothermia. But none of them had the outfit or equipment that an experienced hiker would be depending on in such a situation.

The Remaining Four

Two months down the line, the four remaining hikers were located in a ravine further into the woods believing they were buried under many meters of snow. These corpses showed so horrible injuries that they created decades of speculations.

• Lyudmila Dubinina was missing her tongue and eyes, some of her ribs were broken, and she had no eyes.
• An almost equal ribcage collapse befell Semyon Zolotaryov.
• Nikolai Thibeault-Brignolle was wearing a broken head.
• Alexander Kolevatov also looked injured but not so badly.

The experts said that it takes an amount of force to administer such internal injuries, that it could not have been a fall or avalanche but a car crash. Moreover, the radioactive traces were present even in their clothes, which made it even harder.

Theories and Explanations

The Dyatlov Pass has spawned an incredible plethora of theories in over sixty years, some based on scientific argument, others steeped in mystery. The most influential explanations that have taken part in molding the imagination of people are as follows:

Avalanche Theory

In 2019, Russian authorities concluded in a new investigation that the hikers died as a result of a slab avalanche. This form of avalanche is capable of taking place on a shallow slope and applying enormous pressure, which can be the reason behind the chest traumas. They claimed that the hikers tore open the tent to get out and then died of cold.

There are however criticisms which note that the slope was not the best in such an avalanche and that rescue workers did not see it coming. The tent was lying partially erect, and there was no sign of a great snow-slide.

Katabatic Wind

Another scientific hypothesis is sudden, violent katabatic winds which are strong downdrafts with the capacity to flatten a camp site and panic. The hikers might have run out of the tent to be trampled or swept. Nevertheless, extreme internal injuries cannot be entirely explained by this.

Paradoxical Undressing

Hypothermia may lead to a feeling of overheating, which motivates the hypothermia victims to strip off. But this is no reason why certain hikers were entirely dressed, or why the tent was slain within.

Military Experiments

There is a theory that it was a place where something was tested secretly by the Soviets, maybe parachute mines or radioactive material. This may be the reason behind the odd injuries, glowing orbs that the locals reported about and the radioactive traces on the clothing. No concrete evidence, however, has come up.

Indigenous Attack

The Mansi people were initially a suspect, however, investigators did not find any evidence of struggle or the footprints of any person that were not members of the group. The Mansi were known to be peaceful, and they had no reason to violence.

Yeti or Animal Attack

This is a catchy yet improbable notion that a wild animal startled the company. But there were no animal tracks, and the mutilations were too great to most animals.

Supernatural or Extraterrestrial Causes

The enthusiasts of UFO’s refer to the sight of glowing bodies in the sky and the strange behavior of the hikers. Although interesting, this theory cannot be proved and is usually disregarded by scientists.

A Legacy of the Dyatlov Pass

The Dyatlov Pass still seems to be a source of books, movies, research works, and countless arguments today. The field is now a maze of inquisitive explorers and investigators who want to dig up hints. The hikers who lost their lives were honored by giving the previously nameless pass its official name, Dyatlov Pass, named after the head of their group.

Over half a century later, the question of the story haunts the same as ever: What power was so strong as to cause nine experienced hikers to leave their tent in the deadly cold of night. The Dyatlov Pass will continue to be a potent reminder of the mysteries of nature, until the time when definite evidence is located, and even the most knowledgeable explorers may succumb to the forces that we are not able to comprehend.