Úlfljótsvatn
Úlfljótsvatn
Úlfljótsvatn
Location	Southern Region, Iceland
Coordinates	64°7′12″N 21°1′59″W / 64.12000°N 21.03306°W / 64.12000; -21.03306
Primary inflows	Sog
Primary outflows	Sog
Basin countries	Iceland
Max. length	4 kilometres (2.5 mi)
Max. width	1.2 kilometres (0.75 mi)
Surface area	3.6 km2 (1.4 sq mi)
Average depth	4.7 metres (15 ft)
Max. depth	34.5 metres (113 ft)
Water volume	16 gigalitres (570,000,000 cu ft)
Surface elevation	80 m (260 ft)
References	https://kristjfr.files.wordpress.com/2015/03/os_kort_ulfljotsvatn.pdf

Úlfljótsvatn (Icelandic pronunciation: [ˈulvˌljoutsˌvahtn̥], Úlfljótr's Lake) is a lake in southern Iceland, to the south of lake Þingvallavatn, 74km east of Reykjavík. Úlfljótsvatn is named after Úlfljótr, an important man who was involved in the Alþingi (Icelandic Parliament) in 930.^[1]

In the vicinity, the Icelanders have many summer cottages.^{[citation needed]}

The lake has an area of 3.6 km² and is situated at an altitude of 80 m. At the deepest point, Úlfljótsvatn is about 34.5 meters deep.^[2] The lake has a water area of 3.6 km² and is located directly south of the larger lake Þingvallavatn on the Sog river, which continues to Álftavatn.

The lake in the warm season attracts anglers. Trout and lake char can be found in the waters of the lake.^[2]

Orkuveita Reykjavíkur bought the rights in 1929-1933 to generate electricity in the upper run of the Sog. In 1937, the Ljósafoss [ˈljouːsaˌfɔsː] power station was then built, increasing the water level by about 1 metre.

The Icelandic Scout and Guides Association has had its national scout centre by the lake since 1940. It hosted the World Scout Moot there in 2017.

To the east of the lake is road no. 36, southwest of road no. 360.

• List of lakes in Iceland