Lake Brienz is a lake that lies to the north of the Alps, in the canton of Bern in Switzerland. It has a length of nearly nine miles, a wide of 1.7 miles, and a maximum depth of 850 feet. Its area is roughly 11.5 square miles, and the surface is nearly 2,000 feet above sea level. The lake is fed by the upper parts of the Aar River at the eastern side and by the Lutschine River, flowing in from the valleys of Lauterbrunnen and Grindelwald, at its southwestern corner. It flows out into a further part of the Aar river at the western side.
