The Mount Ilgaz National Park is a protected area established since 1976 and located on the Ilgaz Mountains at the borderline between Kastamonu - and Çankırı Province in the western Black Sea Region of Türkiye.
The terrain structure of the Mount Ilgaz region, which is on the transient zone from Central- to North Anatolia, is characterized in general by serpentinite, schist and volcanic rock.
The highest peaks in the range are Büyükhacettepe at 2,587 m, Çeştepe at 2,394 m and Karataş Hill at 2,380 m. The ridges of the Ilgaz Maountains stretch about 23 km in the west–east direction.