Medvednica is a mountain in central Croatia, just north of Zagreb and marking the southern border of the historic region of Zagorje. The highest peak, at 1,033 m, is Sljeme (summit), a name often used to refer to the entire mountain. Most of the area of Medvednica is a nature park (park prirode), a type of preservation lesser than a national park. The area of the park is 228.26 square kilometers and about 63% is covered with forest. The name Medvednica could be translated as "bear mountain", there being other toponyms on the mountain using the kajkavian dialect term medved (standard Croatian "medvjed" = bear), notably Medvedgrad, a medieval castle on its southwestern edges.