Mount Echigo-Komagatake or Uonuma-Komagatake is a mountain located on the border of Uonuma and Minamiuonuma, Niigata Prefecture, Japan, with an elevation of 2,002.7 m (6,571 ft) It is one of the 100 famous mountains in Japan. Mount Echigo-Komagatake, along with Nakanodake and Mount Hakkai, is also one of the three great mountains of Echigo.
Mount Echigo-Komagatake lies in central part of Echigo Mountains, a mountain range over Niigata, Fukushima, and Gunma Prefecture. Between late autumn and early spring, large amount of snow falls in this region because of the monsoon from Siberia, with an average of 3 or 4 meters. Avalanches eroded the surface of the mountain and formed steep precipices, especially on the west and north face. Hikers can see snow on the mountain even in late summer. Thanks to the heavy snowfall, this mountain has many sources of rivers such as Kitanomata River, Mizunashi River, and Sanashi River, which all flow into Sea of Japan. Such abundant water is used mainly for paddy fields, and hydroelectricity.