Þórisvatn sometimes anglicized to Thorisvatn is the largest lake of Iceland, most of the time, just ahead of lake Þingvallavatn, situated at the south end of Sprengisandur highland road within the highlands of Iceland.

It is a reservoir of a surface about 88 km2 and is next to the river Þjórsá, which comes down from the glacier Hofsjökull. In the south, it is used by power station. It is like other Icelandic lakes, which are mostly glacial lakes or volcanic lakes, it normally has a stark green color.

Lake Þórisvatn, located in Iceland, is a stunning natural wonder that offers a unique and breathtaking winter experience. During the winter months, the lake transforms into a frozen wonderland, providing an opportunity for visitors to explore its frozen beauty.

Lake Þórisvatn is the largest lake in the south of Iceland and is known for its clear and pristine waters. The lake is surrounded by stunning landscapes, including snow-covered mountains, glaciers, and forests. During the winter months, the lake freezes over, providing a truly unique and unforgettable experience.

One of the best ways to experience the frozen beauty of Lake Þórisvatn is through winter sports. The lake is popular for cross-country skiing, snowshoeing, and ice fishing. The frozen lake provides a stunning and peaceful backdrop for these winter activities, making it a popular destination for outdoor enthusiasts.

In addition to winter sports, visitors can also explore the surrounding landscapes, including the stunning Þórisvatn Nature Reserve. The reserve is home to a variety of wildlife and vegetation, including arctic foxes and a variety of bird species.