The Baydar or Baydari valley sprawls for 16 km north-east in the Balaklava Raion of Sevastopol, Crimea.
It is the source of the Chorna river and the location of the Chorna River Reservoir, Sevastopol's largest body of fresh water.
A highway from Yalta to Sevastopol traverses the dale.
The Baydar Pass connects the valley to the Black Sea coast.
Most of the valley is protected as a national zakaznik, called the Baydar Nature Reserve.