Altyaghach National Park (Azerbaijani: Altıağac Milli Parkı) — is a national park of Azerbaijan. It was established by the decree of the President of Azerbaijan Ilham Aliyev, on an area of 11,035 hectares (110.35 km2) in the Khizi Rayon and Siazan Rayon administrative districts on August 31, 2004
The area of Altyaghach is 90.5% covered by temperate deciduous broadleaved forests. The major types of trees are Persian Ironwood (Parrotia persica), Caucasian Oak (Quercus macranthera), Caucasian Ash (Fraxinus angustifolia subsp. oxycarpa), European Hornbeam (Carpinus betulus), Oriental Hornbeam (Carpinus orientalis), Oriental Beech (Fagus orientalis), Silver Birch (Betula pendula), White Birch (Betula pubescens), etc. Shrub species occurring in the area include Various-Leaved Hawthorn (Crataegus heterophylla), Dog Rose (Rosa canina), Blackberry (Rubus fruticosus), etc. The national park is home to the rare East Caucasian tur (Capra cylindricornis), a mountain dwelling goat antelope found only in the eastern half of the Caucasus Mountains.
Other large mammals found here are the lynx (Lynx lynx), brown bear (Ursus arctos), wild boar (Sus scrofa), wolf (Canis lupus), golden jackal (Canis aureus), jungle cat (Felis chaus), red fox (Vulpes vulpes), roe deer (Capreolus capreolus), badger (Meles meles), and otter (Lutra lutra), etc.