Tunkinsky National Park (Russian: Тункинский) (also called Tunka National Park) is a national park located in south central Siberia, covers a mountainous region centered on the Irkut River valley (also referred to as the Tunka Valley) that continues from the rift valley of Lake Baikal southwest to the border of Mongolia. To the north and west of the valley is the eastern edge of the Sayan Mountains. To the east are the lower Khamar-Daban mountains. About in size, the park occupies the entirety of the Tunkinsky District of the Republic of Buryatia. It is about 200 km southwest of the city of Irkutsk.