Alappuzha (Kerala), Aug 14 (ANI): Thousands of people, including tourists from abroad, gathered at Punnamada Lake in Kerala to witness the annual Nehru Trophy boat race. Also known as the snake boat race, the annual regatta is held in Alappuzha District of the state in the month of August every year. This also marks the beginning of tourism season in the state. This year 78 boats of different sizes, including 22 ‘chundan vallom’ (snake-boats), participated in the event. An estimated 15 small and big boat races are held during this monsoon season alone but the Nehru Trophy boat race is the most popular of all the races.