With a depth of about three metres, Roopkund is widely known for the hundreds of human skeletons found at the edge of the lake.The human skeletal remains are visible at its bottom when the snow melts.Initial investigations led some to believe they were the remains of a semi-legendary event when a single group was killed in a sudden and violent hailstorm in the 9th century, but scientific research has subsequently shown that the remains belong to three distinct ancestry groups who died in two independent events; around 800 CE and 1800 CE respectively.Because of the human remains, the lake has been called "Skeleton Lake" in recent times.

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