The Köroğlu Mountains are a mountain range

Mountain range

A mountain range is a single, large mass consisting of a succession of mountains or narrowly spaced mountain ridges, with or without peaks, closely related in position, direction, formation, and age; a component part of a mountain system or of a mountain chain...

 situated in the northern Turkey

Turkey

Turkey , known officially as the Republic of Turkey , is a Eurasian country located in Western Asia and in East Thrace in Southeastern Europe...

, north of Ankara

Ankara

Ankara is the capital of Turkey and the country's second largest city after Istanbul. The city has a mean elevation of , and as of 2010 the metropolitan area in the entire Ankara Province had a population of 4.4 million....

. It rises along the North Anatolian Fault

North Anatolian Fault

The North Anatolian Fault is a major active right lateral-moving strike-slip fault in northern Anatolia which runs along the transform boundary between the Eurasian Plate and the Anatolian Plate. The fault extends westward from a junction with the East Anatolian Fault at the Karliova Triple...

 and the Black Sea

Black Sea

The Black Sea is bounded by Europe, Anatolia and the Caucasus and is ultimately connected to the Atlantic Ocean via the Mediterranean and the Aegean seas and various straits. The Bosphorus strait connects it to the Sea of Marmara, and the strait of the Dardanelles connects that sea to the Aegean...

.

This range crosses the provinces of Bolu

Bolu Province

Bolu Province is a province in north western in the Black Sea region of Turkey, midpoint between the large cities of Istanbul and Ankara. It covers an area of 7,410 km², and the population is 271,208....

, Çankırı

Çankiri Province

Çankırı Province is a province of Turkey, which lies close to the capital, Ankara. The provincial capital is Çankırı.-Economy:Çankırı is primarily agricultural with wheat, beans, corn and tomatoes the most common crops.-Climate:...

 and Çorum

Çorum Province

Çorum Province is a province in the Black Sea Region of Turkey, but lying inland and having more characteristics of Central Anatolia than the Black Sea coast....

, and its limits are Sakarya River, to the west, and Kızılırmak River, to the east.

The highest place, situated south of Bolu

Bolu

- Places of interest :The countryside around Bolu offers excellent walking and other outdoor pursuits. There are hotels in the town for visitors. Sights near the town include:* The 14th century mosque, Ulu Camii...

, is an andesitic

Andesite

Andesite is an extrusive igneous, volcanic rock, of intermediate composition, with aphanitic to porphyritic texture. In a general sense, it is the intermediate type between basalt and dacite. The mineral assemblage is typically dominated by plagioclase plus pyroxene and/or hornblende. Magnetite,...

 formation, constituted by a plateau

Plateau

In geology and earth science, a plateau , also called a high plain or tableland, is an area of highland, usually consisting of relatively flat terrain. A highly eroded plateau is called a dissected plateau...

 where is situated the highest point of this range, Köroğlu Tepesi, at 2,378 m (7,802 ft) above sea level. This place has forests with fir

Fir

Firs are a genus of 48–55 species of evergreen conifers in the family Pinaceae. They are found through much of North and Central America, Europe, Asia, and North Africa, occurring in mountains over most of the range...

s and pine

Pine

Pines are trees in the genus Pinus ,in the family Pinaceae. They make up the monotypic subfamily Pinoideae. There are about 115 species of pine, although different authorities accept between 105 and 125 species.-Etymology:...

s, extensive summer pastures and picturesque yaylas (mountain resorts with alpine cabins).

Recently, two ski resort

Ski resort

A ski resort is a resort developed for skiing and other winter sports. In Europe a ski resort is a town or village in a ski area - a mountainous area, where there are ski trails and supporting services such as hotels and other accommodation, restaurants, equipment rental and a ski lift system...

s near Köroğlu Tepesi were inaugurated: Kartalkaya

Kartalkaya

Kartalkaya is a ski resort located in the Köroğlu Mountains, in Bolu Province, Turkey.-Description:Kartalkaya has suitable conditions for alpine skiing, ski touring and cross country skiing...

 and Sarialan, with altitudes between 1,900 m (6,233 ft) and 2,350 m (7,708 ft).