Mahasu Devta Temple is an ancient temple of Hindus, dedicated to God Mahasu Devta. This temple is located in Hanol village of Uttarakhand state of India. The Mahasu Devta Temple is about 190 km from Dehradun and 156 km from Mussoorie on the eastern coast of the Tons River (Tamas) in Hanol village near Chakrata. Mahasu is the chief god of this region and people of Hanol and surrounding villages are worshiped in the Mahasu Devta temple.
This temple of Hanol, the hill areas of Uttarakhand, west of the Yamuna river, trans Giri area of Sirmaur district and the Shimla district of Himachal Pradesh and a pilgrim center for those living in these areas.
The people of these areas know Mahasu as the god of justice. In these areas, Mahasu Devta is considered as the court of justice and the temple of justice. Even today, the devotees of Mahasu Devata can easily see the plea of justice and solutions for their problems in the temple.
The 'Mahasu' Devta is the collective name of one of the four deities and in the local language is the absence of the word 'Mahashiv'. The names of the four Mahasu brothers are: Pavasik Mahasu, Vasik Mahasu, Botha Mahasu and Chalda Mahasu. The people of this area are considered as the sons of Lord Shiva.
It is believed that this temple of Mahasu Devta was built in the 9th century. This temple was initially built in Huna architectural style, but during the time, this temple was built in a mixed architectural style. This temple has been included in the Archaeological Survey of India in the ancient temple of Dehradun Circle of Uttarakhand.
According to Hindu mythology, a demon named Karmic plagued people living in this village. The people of the village were upset with this monster. A devotee of Lord Shiva performed austerity of Lord Shiva and Lord Shiva pleased and gave Deolari Devi four sons. There was a battle between the monster and these four brothers, which lasted for a few days and in the end, four brothers managed to kill monsters. After a few years, a farmer farmed in his farm, got four Shivlinga, which was named after Deolari Devi - Botha, Pawasik, Vaishik and four warrior sons of Chalda. Since then, the villagers started worshiping Lord Shiva in the name of Mahasu Devta.