Gwanaksan Dulle-gil is a hiking course near Sadang-dong and Nakseongdae in Seoul. The path runs between rocks rounded by weathering, and sections with many trees provide shade. It can be reached from Sadang-dong via the Nambusunhwan-ro ecological overpass, and it can be walked at night. Where the path briefly breaks near Nakseongdae, the reconnecting route is hard to find.