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Natural Monuments

United States
New Hampshire
Grafton County

The Basin (Pemigewasset River)

Discover
Places to see

Natural Monuments

United States
New Hampshire
Grafton County

The Basin (Pemigewasset River)

Highlight • Natural Monument

The Basin (Pemigewasset River)

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Hiking

by 13 explorers

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    Location: Grafton County, New Hampshire, United States

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    June 8, 2025

    Hiking

    The Basin is a 30-foot-wide, 15-foot-deep glacial pothole in the Pemigewasset River, formed by melting glaciers at the end of the last Ice Age. Its smooth granite walls were shaped by swirling sand and stones over thousands of years and is an absolutely striking sight, worthy of capturing some incredible photos. Nineteenth-century writers like Henry David Thoreau admired its beauty, calling it one of New England’s most remarkable curiosities.

    May 26, 2024

    Hiking

    Wow! If you didn't know the power of water, you'll see it here!
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    Best Hikes to The Basin (Pemigewasset River)

    4.7

    (9)

    93

    hikers

    1. Lonesome Lake – The Basin (Pemigewasset River) loop from The Basin

    12.2km

    04:30

    480m

    480m

    Moderate hike. Good fitness required. Mostly accessible paths. Sure-footedness required.

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    Moderate

    Hard hike. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required.

    Hard

    Hard hike. Very good fitness required. Mostly accessible paths. Sure-footedness required.

    Hard

    Details

    Informations

    Elevation 450 m

    Weather

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    Today

    Friday 30 January

    -17°C

    -25°C

    11 %

    Additional weather tips

    Max wind speed: 15.0 km/h

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    Location: Grafton County, New Hampshire, United States

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