Gwanaksan (Korean: 관악산) is a mountain in southern Seoul, South Korea. Portions lie in the Gwanak District and Geumcheon District of Seoul; other portions lie in the neighboring cities of Anyang, Gyeonggi and Gwacheon. The name gwanak (Korean: 관악) means "hat-shaped peak," and refers to its gat-like profile. Mount Gwanak together with Mount Songaksan in Kaesong, Gamaksan (Gyeonggi) in Paju, Uaksan in Pocheon, and Hwaaksan in Gapyeong, was long considered one of the five representative peaks of Gyeonggi Province.