Lake Batur is a volcanic crater lake in Kintamani, Bali, Bangli Regency of Bali, located about 30 km (19 mi) northeast of Ubud in Bali. The lake is inside of the caldera of an active volcano, Mount Batur, located along the Ring of Fire of volcanic activity.
Lake Batur lies south-east of the active Mount Batur volcano, inside the older Batur caldera. The deepest point in the lake is around 88 meters. The Batur caldera is an important agricultural area, with cultivation of a wide range of produce. The irrigation water flows back into the lake after it has been pumped up, bringing with it nutrients to the lake body.
In the village of Toya Bungkah, there are several hot springs related to the volcanic activity of the Mount Batur volcano. These have been developed for tourism purposes. The water from these hot springs flows into the lake. The Batur lake has been in recent years, farmed for fish. The Nile tilapia was the dominant species in the lake when a study was undertaken in 2011. The local name for the fish is Ikan Mujair.