The history of mansar and surinsar lake goes back to the time of Mahabhartata. Babar Vahan, son of Arjun and Ulpi (daughter of king Nag), was ruling this area during Mahabhartata. After the war of the mahabhartata arjun performed "Ashwamegh Yagya" to prove his supriority over the land. The horse (used as sign of power for Ashwamegh Yagya) was captured by Babar Vahan at village 'khoon' nearby village Ramkot on dhar Udhampur road where Arjun was killed by babar vahan. With joy of victory, babar vahan presented the head of Arjun to his mother Ulpi. She told him that he has killed his father. To make arjun alive again, mani from sheshnag was required. Hence babar vahan made a surang through his arrow and formed surangsar which is now named as surinsar. After defeating sheshnag and capturing mani, babar vahan came out at manisar later on known as mansar.
Mansar is a holy site as well, sharing the legend and sanctity of Lake Mansarovar. There are ancient temples on the lake side, which are often visited by devotees in large numbers. Some Hindus from the region perform Mundan (First hair cut) ceremony of the male baby here.