Snake boat races are the highlight of the Onam Festival in August/September, particularly the Aranmula Boat Race, which takes place mid way through the 10 day celebrations.

Vallam Kali includes races of many kinds of traditional boats (paddled longboat) of Kerala. The race of Chundan Vallam (snake boat) is the major event. Hence Vallam Kali is also known in English as Snake Boat Race and now in recent years has become a major tourist attraction.
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