Doupki-Djindjiritza Biosphere reserve, Biosphere reserve in Pirin region, Bulgaria

Doupki-Djindjiritza is a biosphere reserve in the Pirin region consisting of layered terrain that rises steeply from lower valleys to high peaks. The land contains marble rock formations and underground passages created by water flowing through stone, with forests covering the lower slopes and alpine meadows appearing higher up.

The Bulgarian government designated this area as a protected reserve in 1934, recognizing its natural value early in the conservation movement. Nearly 40 years later, it gained international recognition as a UNESCO Biosphere Reserve in 1977, joining a network of protected areas worldwide.

The name Bayuvi Dupki means "Bayu's hollows", while Dzhindzhiritsa refers to the reserve's forest section. The chamois is one of the reserve's symbols, and the Macedonian pine and Bosnian pine forests it protects are Balkan endemics. Visitors may walk only along marked trails, including the route from Predel hut via Yavorov hut to Vihren hut.

Walking paths marked with signs run throughout the reserve, making it possible to explore different sections without getting lost. The nearby town of Razlog offers places to stay and eat, serving as a convenient base for visiting the area.

The reserve's name combines two former reserves: Bayuvi Dupki, 1450 ha, where 477 plant species have been recorded, including 16 local and 42 regional endemics, and Dzhindzhiritsa. The plant Oxytropis kozhuharovii grows nowhere else on Earth. The chamois is one of the reserve's symbols.