Siddha Ganapati Temple is located at near regional hospital road, National Highway 70, Mandi, Himachal Pradesh. As the name suggests this temple is dedicated to Lord Ganesha who is the son of Lord Shiva. The temple was erected by the ruler of princely state of erstwhile Mandi, whose name was Raja Siddhi Sen. Whereas Siddhi Sen erected the temple, so the temple was known as by the name of King.
Before the beginning of any auspicious performance, Lord Ganesha is recollected every year on the Chaturthi in the month of August / September. All devotees worship Lord Ganesha for 10 days and a special fair is held in Mandi at the temple of Siddha Ganapati. Also at the temple prasad is also distributed among all the devotees every day. On the 10 day evening, with the great celebration (with music and dance) the murti of Lord Ganesha (Image that expresses a Divine Spirit) is immersed into the water (into the Beas River under Victoria Bridge). This special occasion of immersing the Murti of Lord into the water is known as Ganpati Visarjan. More than 1000 devotees and visitors from the state come to see, enjoy and celebrate the special occasion. Local people of Mandi and devotees believe that after this Ganpati Visarjan, Lord has gone home.