Beykoz Göknarlık Nature Conservation Area is closed to visitors, and the directorate states it in one line. The area covers 46 hectares at the Validesuyu locality in Tokatköy, Beykoz district of İstanbul, and was declared on 2 December 1987.

What it protects is, in the directorate's words, the only natural fir stand in İstanbul and its surroundings — a rare ecosystem, and one it describes as under threat. The threats are named rather than implied: clearance and settlement encroaching on the site, along with hunting, grazing and insect pests.

Fir grows there with sweet chestnut, lime, hornbeam, hazel and strawberry tree. Hare, squirrel, mole, reptiles and birds are the animals recorded.

Designated
2.12.1987Checked: September 13, 2026

Visiting hours

Visiting hours
09:00 - 20:00Checked: September 16, 2026

When to go

Climate
Across İstanbul as a whole, monthly mean temperatures run from 6.8 °C in January to 24.7 °C in August; the mean stays between 15 and 25 °C in May, June, July, August, September and October; rainfall is heaviest in December (99 mm) and lightest in July (22 mm). Long-term means for 1950-2025 from the Turkish State Meteorological Service (MGM).Checked: September 22, 2026