The floating stump of Oregon's Crater Lake

The Old Man of the Lake is the name given to a 30-foot (9.1 m) tall tree stump, most likely a hemlock, which has been bobbing vertically in Oregon's Crater Lake since at least 1896.

At the waterline, the stump is about 2 feet (61 cm) in diameter and stands approximately 4 feet (120 cm) above the water. The surface has been bleached white by the elements. The exposed end of the floating tree is splintered and worn but wide and buoyant enough to support a person's weight.

Fontinalis, a moss that is present in the waters of Crater Lake at a depth of 394 feet (120 m), also grows on the Old Man of the Lake, the only place the moss is found near the surface.

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