Bolkar mountains (old name: Bulgar Dagh) are a mountain range situated in the middle part of the Taurus mountains complex in southern Turkey bounded by the Göksu River to the west and the Pozantı River to the east. The northern part of the mountains lies in Niğde province, while the southern peaks rise in Mersin province.
Vipera bulgardaghica is a venomous viper species endemic originated from this mountain range.