Lake Tahoe is a large freshwater lake in the Sierra Nevada mountains of the United States. It is located along the border between California and Nevada, west of Carson City, Nevada. Lake Tahoe is the largest alpine lake in North America. Its depth is 1,645 ft (501 m) making it America’s second-deepest. The lake was formed about 2 million years ago and is a part of the Lake Tahoe Basin with the modern Lake being shaped during the Ice Ages. The lake is known for the clarity of its water and the panorama of surrounding mountains on all sides. The area surrounding the lake is also referred to as Lake Tahoe, or simply Tahoe.