The Bukhansan National Park in Seoul and Gyeonggi covers an area of 79.92 km2 and was established on 2 April 1983. Bukhansan means "mountains north of the Han River." The park contains forested areas, temples and granite peaks. The three main peaks are Baekundae, 836.5 m, Insubong, 810.5 m and Mangnyeongdae, 799.5 m. Due to its popularity with hikers and Seoul residents, some trails are closed on a rotation basis to protect the local environment.