Tyrifjord

Tyrifjord is a large lake located in Buskerud county, Norway. It is the fifth-largest lake in Norway by surface area, with a total area of 138.5 square kilometers. The lake has a maximum depth of 295 meters and a volume of 13.5 cubic kilometers. Tyrifjord is a significant source of drinking water for several municipalities in the region.

The lake is characterized by its irregular shape and numerous islands. Its shoreline is highly indented, with many bays and fjords. The surrounding landscape is a mix of agricultural land, forests, and hills. Tyrifjord is drained by the Tyrifjord River, which flows into Drammensfjord. The lake is a popular destination for recreational activities such as fishing, boating, and swimming. It is home to a variety of fish species, including perch, pike, and trout.

Tyrifjord has a long history and has been inhabited since prehistoric times. Archaeological findings suggest that the area was settled by hunter-gatherers in the Stone Age. During the Viking Age, the lake was an important transportation route. In more recent history, Tyrifjord has played a role in industrial development, with several factories and mills established along its shores. The lake also has cultural significance, appearing in local folklore and literature. The 2011 Norway attacks occurred on and around Tyrifjord, specifically on the island of Utøya.