The Marsar Lake is an oligotrophic alpine lake in Aru, Anantnag District of the Kashmir Valley in India. The lake is one of the several lakes dotting the Aru valley and is famous for its scenic beauty and is about 2.5 Kms long and about 1 km wide.It is a source of Dachigam Nallah. According to the regional folklore, there are multiple superstitions attached with Marsar Lake and that’s why the surrounding area gives a deserted look but still the rocky terrain around the lake attracts trekking lovers from all the corners of the world thus making the lake a well-known name among Pahalgam tourist places to visit. Lake along with Tarsar Lake forms a challenging trekking trail that adds another feature to the adventure of Jammu and Kashmir tourism.