CentralNotice From Wikipedia, the free encyclopedia Jump to: navigation , search This article is about the crater. For the comic song, see Hole in the Ground . Hole-in-the-Ground Hole-in-the-Ground Highest point Elevation 4,650 ft (1,420 m) Coordinates 43°24′10″N 121°11′54″W  /  43.4029089°N 121.1983457°W  / 43.4029089; -121.1983457 Coordinates : 43°24′10″N 121°11′54″W  /  43.4029089°N 121.1983457°W  / 43.4029089; -121.1983457 [1] Geography Location Lake County , Oregon , U.S. Parent range Cascades Topo map USGS Hole In The Ground Geology Mountain type maar Last eruption about 50,000 to 100,000 years ago Hole-in-the-Ground is a large maar (volcanic explosion crater) in the Fort Rock Basin of Lake County , central Oregon , northeast of Crater Lake , near Oregon Route 31 . [2] It is about 1.0 mile (1,60...