Is it easy to travel to Skeleton Lake in Roopkund or does the altitude make it a difficult trek? I read that the lake has hundreds of skeletons littered about the shoreline. For the longest time they weren't sure what had happened to these people, to have so many die in one area. They have dated the bodies to 850 AD and believe they all died while they were likely traveling through the valley with guides. Injuries to their skulls suggest they were hit with a storm that rained down hail, like hard stones and the people had nowhere to hide.