This is a much secured fort and difficult to access because of extreme sublimity and strong fortification. The wall of the fort, about 6 m high, is strengthened by two rows of machicolations. A river surrounds it from three sides and an arduous uphill ascent on the fourth.

During the rule of Maharaja Ranjit Dev, Mian Rattan Dev had conducted the siege of fort for some years and brought it under his possessions. Legend says that Sikh Sardar Sahib Singh of Gujarat and Mohan Singh Sukarchaka invaded Khairi-Kharidi and attacked the fort but could not succeed.

Mangaladevi Fort contains a treasury building and a large tank in damaged condition besides a modern temple of Mangla Mata.