Ōnuma Quasi-National Park
Ōnuma Quasi-National Park (大沼国定公園 Ōnuma Kokutei Kōen) is a 90.83 km2 (35.07 sq mi) quasi-national park on the Oshima Peninsula in southwest Hokkaidō, Japan. The park encompasses the volcanic Hokkaidō Komagatake (北海道駒ケ岳 Hokkaidō Koma-ga-take) as well as the Ōnuma (大沼) and Konuma (小沼) ponds, which abut against the west slope of the mountain. The park, which was designated as quasi-national in 1958, is the smallest major park in Hokkaidō.
|Ōnuma Quasi-National Park|
Hokkaidō Komagatake, in the center of the park, at dusk.
|Area||90.83 km2 (35.07 sq mi)|
|Established||July 1, 1958|
|Designated||3 July 2012|
Ōnuma and Konuma were created when mudflows due to eruptions of Hokkaidō Koma-ga-take dammed up depressions at the base of the mountain. The ponds, which are dotted with watershields, are surrounded by birch and maple forests.