The annual Bangkok Marathon in Thailand attracts more than 30,000 runners and passes many of Bangkok's historical and cultural attractions. It is well known as "the longest marathon in the world" due to the addition of 6 km to the race in 2015. It started from 1988 to the present. Sunday of the third week of November every year. (start and end of the race) located on Sanchai Road. In front of the Grand Palace and Wat Phra Kaew or the Ministry of Defense. Traffic in the area is closed on the day of the event. It is said to be the place with the most elegant surroundings.