Hole-in-the-Ground is a large maar (volcanic explosion crater) in the Fort Rock–Christmas Lake Valley basin of Lake County, central Oregon, northeast of Crater Lake, near Oregon Route 31. It is about 1.0 mile (1,600 m) across, a little longer N-S than E-W. Its floor is about 150 meters (490 ft) below the surrounding ground level and has a rim that rises 35 to 65 meters (110 to 210 ft) above, the highest point on the east side.
Hole-in-the-Ground is a large maar (volcanic explosion crater) in the Fort Rock–Christmas Lake Valley basin of Lake County, central Oregon, northeast of Crater Lake, near Oregon Route 31. It is about 1.0 mile (1,600 m) across, a little longer N-S than E-W. Its floor is about 150 meters (490 ft) below the surrounding ground level and has a rim that rises 35 to 65 meters (110 to 210 ft) above, the highest point on the east side.
Source: Wikipedia "Hole-in-the-Ground" · CC BY-SA 4.0
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