Pirgulu State Reserve was established on the area of 15.21 km² in 1968 for protecting mountain forests, herbage of different kinds, fertile soil, expanding forest areas, preventing air pollution that has a negative impact on astroclimate. The flora of the reserve includes over 60 species. One can come across such mammals as brown bear, wolf, forest cat, lynx, weasel, wild boar, roe deer, etc. [1]
The area of Pirgulu State Reserve was expanded by 27.53 km² and reached 42.74 km² in 2003. [2]