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.

Boat racing is a sport in which boats, or other types of watercraft, race on water. Boat racing powered by oars is recorded as having occurred in ancient Egypt, and it is likely that people have engaged in races involving boats and other water-borne craft for as long as such watercraft have existed.