Lake Tyrifjorden is a large lake located in Norway, specifically in the region of Buskerud. It is the largest lake in the area, covering approximately 77 square kilometers. The lake is known for its scenic beauty, surrounded by mountains and forests, making it a popular destination for outdoor activities such as hiking and fishing. The lake is fed by several rivers, including the Randselva, and drains into the River Drammenselva. It has a maximum depth of about 150 meters and is home to various fish species, including trout and pike. The surrounding area is rich in wildlife, contributing to its ecological significance.