Myōkō-Togakushi Renzan National Park is a national park in Niigata Prefecture and Nagano Prefecture, Japan. Established in 2015, and formerly part of Jōshin'etsu-kōgen National Park, the park comprises an area of 39,772 ha in the municipalities of Itoigawa and Myōkō in Niigata Prefecture and Iizuna, Nagano, Otari, and Shinano in Nagano Prefecture. Prominent features of the park include Mount Myōkō, Mount Togakushi, Mount Amakazari, Mount Iizuna, Mount Kurohime, Niigata-Yake-Yama, and Lake Nojiri.