Goddess Vaishno Devi is the incarnation or amsha or power of the Three Devis, Goddess Saraswathi, Goddess Lakshmi and Goddess Parvathi, in order to eliminate the evil Bhairovnath, a wicked person and some other asuras. As the legend goes, more than 700 years ago Vaishno Devi a devotee of Lord Vishnu, used to pray to Lord Rama and had taken vow of celibacy. Bhairon Nath, a tantric (demon-God) tried to behold Her. Making use of his tantric powers, Bhairon Nath was able to see Her going towards the Trikuta mountains and gave chase. The Goddess felt thirsty at Banganga and shot an arrow into the earth from where water gushed out. Charan Paduka, marked by the imprints of Her feet, is the place where she rested. The Goddess then meditated in the cave at Adhkawari. It took Bhairon Nath nine months to locate Her, the reason why the cave is known as Garbh Joon. Mata Vaishno Devi blasted an opening at the other end of the cave with Her Trident when the demon-God located Her.
On arriving at the Holy Cave at Darbar, she assumed the form of Maha Kali and cut off Bhairon Nath's head which was flung up the mountain by the force of the blow and fell at the place where the Bhairon Temple is now located. The boulder at the mouth of the Holy Cave according to the legend is the petrified torso of Bhairon Nath who was granted divine forgiveness by the benevolent Mata in his dying moments.
The Matas shrine/cave is nestled in the mighty Trikuta mountain 61 kilometres north of Jammu at a height of 5,200 feet above the sea level in the state of Jammu and Kashmir, India. The shrine is visited all through the year, but the path is difficult during the winters due to snowfall. The Yatra begins at Katra and pilgrims have to cover 13 km. of terrain on foot to reach the Darbar. One kilometer away from Katra, you would find Banganga, place where Mata quenched her thirst and at 6 km., the holy cave at Adhkawari.