Located 15 kms away from Pathanamthitta on the banks of Achankovil river, is the Valiyakoyickal Temple of Sri Dharma Sastha. Believed to be constructed by the Raja of Pandalam, this Ayyappa shrine has been modeled on the Sabarimala temple. Pilgrims usually stop here to worship before proceeding to Sabarimala. One of the major events associated with the 'Makaravilaku' festival is the procession carrying the 'Thiruvabharanam' (sacred ornaments) of Lord Ayyappa from the Valiyakoyical temple to Sabarimala. This is performed three days prior to makaravilakku.

According to legends, Ayyappa as a babe was found lying of the banks of the river Pampa, by the Raja of Pandalam. The Raja considered the child as a God-given gift and brought him up royally. Young Ayyappan had heavenly splendour, super human wisdom and physical powers.