Lake Tritriva is a volcanic lake in southwest-central Madagascar, in the region of Vàkinankàratra, located near the village of Belazao. The lake fills an extinct crater in a region notable also for the presence of many hot springs. It sits in the vent of an oval volcanic cone enclosed in vertical gneiss cliffs. The lake's water level drops during the rainy season and rises when the monsoon rains have ceased.
Tritriva was drawn to the attention of the larger world by James Sibree, Jr. in 1885.
Tritriva is a town and commune in Madagascar. It belongs to the district of Betafo, which is a part of Vakinankaratra Region in Antananarivo Province. The population of the commune was estimated to be approximately 17,000 in 2001 commune census.
Only primary schooling is available. The majority 90% of the population of the commune are farmers, while an additional 10% receives their livelihood from raising livestock. The most important crop is potatoes, while other important products are maize, barley, rice and soya.
Coordinates: 19°55′S 46°56′E / 19.917°S 46.933°E / -19.917; 46.933