Vellattu Mahothsavam is a famous festival celebrated in Avanangattil Kalari Sree Vishnumaya Temple in
Thrissur District. It is a famous temple dedicated to Lord Vishnumaya.
This annual festival is celebrated in the Malayalam month Kumbham (February-March). The royal procession of Lord Sree Vishnumaya is the major event during the festival. During the auspicious occasion, thousands of devotees visit this temple to get the divine grace and blessings. Cultural programs are also organized.