Lake Langavatn has an area of 5,1 km². It is located 215 m above sea level with an area of 5,1 km² and its greatest depth is 36 m. It was created by the lava dam, which closed the valley during a prehistoric eruption. On its southeastern side is a refuge hut. River Langavatnsa enters the northern part of the lake and river Beila from the southeast. Its discharge is river Langa and at its exit a dam was built to regulate the flow to enable salmon rearing in the river.

The lake over abounds in lake char. It usually weighs no more than a pound, but there are occasional larger ones in-between. Brown trout is mostly caught near the mouths of the rivers entering the lake. Lake Langavatn is popular among families because of its richness in fish and natural beauty.
Daily opening hours:
Fishing is allowed from 07:00 to midnight Season : May 1st to 20th September.
Bait: Bait allowed: fly, worm and lure.Contact:
SVFR, Tel. (+354-568-6050)

The distance from the capital is 93 km by the Whale Bay tunnel and 13 from Svignaskard.