Nehru Trophy Boat Race held every year in Punnamda Lake in Alappuzha district is the most popular and competitive boat races. Many types of boats like Churulan Vallam, Iruttukuthy Vallam, Odi Vallam, Veppu Vallam, Vadakkanody Vallam and Kochu Vallam take part in different events but the most popular event of the race is the Chundan Vallams or snake boat race.