Rakshas Tal

Lake Rakshastal
Satellite view of lakes Rakshastal (left) and Manasarovar with Mount Kailash in the background
Location	Tibet Autonomous Region
Coordinates	30°39′N 81°15′E / 30.65°N 81.25°E / 30.65; 81.25Coordinates: 30°39′N 81°15′E / 30.65°N 81.25°E / 30.65; 81.25

Lake Rakshastal (Tibetan: ལག་ངར་མཚོ།, ZYPY: Lagngar Co; Wylie transliteration: lag-ngar mtsho; Chinese: 拉昂错, Pinyin: Lā'áng Cuò; La'nga Co) is a lake in Tibet Autonomous Region, lying just west of Lake Manasarovar and south of Mount Kailash. The Sutlej River (also known by the Tibetan name Langqen Zangbo in this area) originates at Rakshastal's northwestern tip. Despite its close proximity to Lake Manasarovar (about 3.7 kilometres or 2.3 miles), Lake Rakshastal does not share the historic religious significance of its eastern neighbor.

The name of the lake literally means "lake of the demon" in Sanskrit. It is also known as Ravana Tal, as it is considered to be the place of severe penance by Ravana, the demon-like egoistic King of Lanka in Hindu theology .

In Buddhism, Lake Manasarovar, which is round like the sun, and Rakshastal, shaped as a crescent, are respectively regarded as "brightness" and "darkness". Its salty water, in stark contrast to the fresh water of Lake Manasarovar, results in there being no aquatic plants or fish, and is considered poisonous by locals. It is a belief that the short river named Ganga Chhu, which connects Lake Manasarovar with Rakshastal, is created by rishis to add pure water from Manasarovar.