Vihar Lake, Freshwater reservoir in Maharashtra, India.

Vihar Lake is a reservoir on the Mithi River near Vihar village, inside Sanjay Gandhi National Park in North Mumbai. Three earthen embankment dams with a masonry spillway section impound the water, held at a full reservoir level of 80.42 metres. The lake's water spread covers 7 km2, with a maximum depth of 34 m and a minimum of 12 m. In the photograph, the pale greyish-blue water is bordered on the left by a small tree-covered rise, and low dark green hills back the far shore.

The reservoir was built during the 19th century and became a key part of Mumbai's water supply system as the city expanded. Construction took place under British colonial rule and transformed the region's infrastructure for generations to come.

The lake lies inside Sanjay Gandhi National Park, so the park's wildlife also applies to its shores. Mugger crocodiles (Crocodilus palustris) live in the water in sustainable numbers but are hard to spot, so the park set up a Crocodile Park where reptiles of different sizes can be seen. The catchment's wooded slopes hold a high share of khair trees.

Public access to the lake has been restricted since 13 March 1993, following the Bombay bombings the previous day, so the water cannot be visited directly. The lake lies inside Sanjay Gandhi National Park, about 31 km by road from Mumbai; by suburban train, reach Kurla or Andheri and continue by road. It can still be seen in long shots taken from Mumbai Film City.

Mugger crocodiles live in the lake in sustainable numbers, but they are hard to spot in the water. The park set up a Crocodile Park where reptiles of different sizes can be viewed. Access to the lake itself has been closed to the public since 13 March 1993, after the Bombay Blasts.