Pathinettapadi (18 divine steps) to the sanctum sanctorium is divine in all aspects. The first three steps depict "Bhoomi, Agni, Vayoo & Akash", 6 to 9 steps for Karmendriya, 10 to 15 for Jhanandriya, 16th for mind 17th Intelligence and 18th Jeevathma Bhava. Those who cross all these steps are believed to achieve "Punyadarshan". The steep steps are so important and holy that no one can climb them without fasting for 41 days and carrying the holy irrumudi on ones' head.There are many mythological stories associated with the holy Patinettampadi. Some believe the eighteen steps denote the 18 puranas. Some say that 18 weapons with which Lord Ayyappa destroyed the evil denotes the 18 steps. Others are of the belief that the first five steps denotes the indriyas (eyes, ears, nose, tongue and skin). The next eight steps signifies the ragas (tatwa, kama, krodha, moha, lobha, madha, matsraya, and ahamkara. The next three steps signifies the gunas (satwa, rajas and thamas). The seventeenth and the eighteenth denotes vidhya and ignorance.

The Patinettampadi can be used only twice - once for ascending the temple and once for descending below leaving the hill. Before ascending or descending the steps, pilgrims break coconut as an offering to the steps. One needs to have the sacre Irumudi on head while going up or down the 18 steps. While descending the steps the devotees climb down backwards facing the sanctum sanctorum.

One who climbs the Patinettampadi for 18 times shall plant a sapling of coconut in Sabarimala.

Built on a plateau about 40 feet high, the Ayyappan temple commands a lofty view of the mountains and valleys all around. The ancient temple has been rebuilt after a fire in 1950. Within the confines of the sanctum sanctorium with a copper-plated roof and four golden finials at the top, two mandapams, the belikalpura which houses the altar, the flag-staff replacing the earlier stone image of the deity, sits a beautiful idol of Ayyappa in panchaloha, an alloy of five metals, about one and a half feet tall.