Theories, theories and theories. There are many of those floating (not literally) mysteries that makes Roopkund Lake so fascinating. Teasing and haunting scientists and travellers, the 300 odd skeletons discovered in and around the lake seem to have cropped up from thin air.
1.)The Angry Goddess- You can choose to believe in the haunting story that the locals tell you. In their words, “Once upon a time, in medieval ages, a king named Jasdhawal started off on a pilgrimage tour of Nanda Devi. He wanted to pay respect to the goddess, for he was about to be blessed by the birth of a child. While local priests warned him against taking a noisy troupe to the sacred site, he paid no heed. As expected, the goddess was infuriated by the gaudy show of festivity and pomp, thus, slayed them all. The king, his queen and their yet to be born child were killed on the trek, with the whole entourage.” There’s a stack of bangles and other ornaments that have been found near the remains, confirming the fact that there were many women in the group. So if you believe in the divine or supernatural, this is the story to stick by. Take a local or two along with you on this trek and hear the story at night time, as you sit by a fire at the lake side. I assure you of rapidly rising goosebumps if nothing else.
2.) Hailstorm- A research undertaken in the year 1942 shed some light on the mystery of the skeletons and corpses found in and around the lake. Going by it, a sudden, intense hail storm caught an unlucky group of trekkers, leading them to sudden, painful death. X-Ray and other tests conducted on the skeletons showed cracks in the skull bones, suggesting hailstones as big as the size of cricket balls! With almost no cover to run to even in current times and the last habitable village some 35 km away, you can very well imagine the plight of a group stuck in the melee. Going by those numbers, the death storm must have come around 850 AD, wiping the group off Earth’s face.