The Koroglu Mountains (Turkish: Köroğlu Dağları) are a mountain range situated in the northern Turkey, north of Ankara. It rises along the North Anatolian Fault and the Black Sea.
This range crosses the provinces of Bolu, Çankırı and Çorum, and its limits are Sakarya River, to the west, and Kızılırmak River, to the east.
The highest place, situated south of Bolu, is an andesitic formation, constituted by a plateau where is situated the highest point of this range, Köroğlu Tepesi, at 2,499 m (8,200 ft) above sea level. This place has forests with firs and pines, extensive summer pastures and picturesque yaylas (mountain resorts with alpine cabins).