Kallada Boat Race (The Kallada Jalotsavam) is one of the most famous boat races held in South Kerala, India. The boat race is an annual event which happens 28 days after Onam (28 aam Onam). Almost all the famous snake boats (Chundanvallam) take part in this event. This boat race is held on the Muthiraparambu-Karuvathrakadavu course of the Kallada River. This year it will be conducted on 23 September. Sasthamkottah lake is the largest fresh water lake in kerala and provides drinking water for most of the places in Kollam district. Except for an earthen embankment of 1.5 km length which separates the lake from the paddy fields on its southern side, bordering the alluvial plains of the Kallada River, all other sides of the lake are surrounded by hills which are steep and form narrow valleys. Sooranad, Chakkuvally, Kunnathur, Mynagappally, Poruvazhy, West Kallada, Karunagappally, East Kallada are the important places in and around Sasthamcotta.