The Nehru Trophy Boat Race is an annual vallam kali held in the Punnamada Lake near Alappuzha, Kerala, India. Vallam Kali or Vallamkaliy literally means boat play/game, but can be translated to boat race in English. The most popular event of the race is the competition of Chundan Vallams. Hence the race is also known as Snake Boat Race in English. Other categories of boats which participate in various events of the race are Churulan Vallam, Iruttukuthy Vallam, Odi Vallam, Veppu Vallam , Vadakkanody Vallam and Kochu Vallam.

Vallam kali, also known as snake boat race, is a traditional boat race in Kerala, India. It is a form of canoe racing, and uses paddled war canoes. It is mainly conducted during the season of the harvest festival Onam in spring. Vallam kali includes races of many kinds of paddled longboats and 'snake boats'. Each team spends about ₹6 lakhs for the Nehru Trophy Boat Race.