The hills are said to be guarded by Kollipavai also called as "Ettukkai Amman", the local deity. According to legend, the sages chose Kolli hills when they were looking for a peaceful place to do their penance.
However, the demons invaded the hills to disrupt the penance when the sages began their rituals. The sages prayed to Kollipavai, who according to the myth, chased away the demons with her enchanting smile. The Kollipavai hills is still worshipped by the people here and her smile is revered.
The mountains have several mythological legends associated with them, and often come across as an eerie place in contemporary tales due to the unexplored and less travelled terrain.
This mountain is full of herbs which retains health and vigour. E. D. Israel Oliver King of MS Swaminathan Research Foundation has documented over 250 sacred forests in Kolli Hills in the year 2005.