Telaga Waja is a river located east of Bali, Indonesia. This river springs water on the slopes of Mount Abang and passes through towns and slopes of wild vegetation along the Rendang Village area, emptying into the sea in Klungkung Regency.

Telaga Waja River is located in Rendang District, Karangasem Regency, East Bali region, is the second largest river after the Ayung River. The water comes from several mountain springs at the foot of Mount Agung, which is the highest mountain in Bali and is sacred by Hindus, such as Lipang springs, Arca springs and Telaga Waja springs. Then there are many other small springs, which then empties into Telaga Waja such as the Yeh Sah river which also comes from natural springs. The combination of rivers and natural springs makes it have a large water discharge, so some of it is also managed by the local government for drinking water. A very popular tourist attraction that can be done along the river trajectory is rafting or white water rafting.

This river flows in the east to south area of ​​the island of Bali which has a tropical rain forest climate (code: Af according to the Köppen-Geiger climate classification). The average temperature a year is around 24 °C. The hottest month is October, when the average temperature is 27 °C, and the coldest is January, at 22 °C. The average annual rainfall is 2123 mm. The rainiest month is January, with an average of 569 mm, and the lowest is September, with an average of 23 mm.