The Dyatlov Pass incident is an unsolved mystery to the deaths of nine ski hikers in the northern Ural mountains on the night of February 2, 1959. The incident happened on the east shoulder of the mountain Kholat Syakhl (Холат-Сяхыл, a Mansi name, meaning Dead Mountain). The mountain pass where the incident occurred has since been named "Dyatlov Pass" (Перевал Дятлова) after the group's leader, Igor Dyatlov (Игорь Дятлов). To this day, the incident has not been solved.