Long Boat-Racing Festival is arranged every year during Thai Buddhist Lent Period (about September or October) on days that river tide is highest. The festival will be held by local people beside rivers from provinces which big rivers pass by such as Phisanulok province, Phichit province has Nan River and Ang-Thong province, Ayutthaya province, Pathum-Thani province has Chao-Phraya River. Boats, which they use on the festival, will be chose and made from auspicious trees of each area's believing. They train and prepare rowing-crews to be most fit and ready for being their agent of the festival.