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Madison Boulder

1946 establishments in New HampshireGlacial erratics of the United StatesLandforms of Carroll County, New HampshireNational Natural Landmarks in New HampshireNew Hampshire geography stubs
Northeastern United States geologic formation stubsParks in Carroll County, New HampshireProtected areas established in 1946Rock formations of New HampshireState parks of New HampshireUse mdy dates from August 2023
Boulder, Madison, NH
Boulder, Madison, NH

The Madison Boulder is one of the largest known glacial erratics in North America and among the largest in the world; it is preserved in the 17-acre (6.9 ha) Madison Boulder Natural Area in Madison, New Hampshire. The boulder is a huge granite rock measuring 83 feet (25 m) in length, 23 feet (7.0 m) in height above the ground, and 37 feet (11 m) in width. It weighs upwards of 5,000 short tons (4,500,000 kg). A part of the block is buried, probably to a depth of 10 to 12 feet (3.0 to 3.7 m). It was acquired by the state from the Kennett family in 1946. In 1970, Madison Boulder was designated as a National Natural Landmark by the National Park Service.

Excerpt from the Wikipedia article Madison Boulder (License: CC BY-SA 3.0, Authors, Images).

Madison Boulder
Wayside Geological Park,

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N 43.93146 ° E -71.1678 °
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Wayside Geological Park
03849
New Hampshire, United States
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Boulder, Madison, NH
Boulder, Madison, NH
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