Somes Sound is a fjard, a body of water running deep into Mount Desert Island, the main site of Acadia National Park in Maine, United States. Its deepest point is approximately 175 ft, and it is over 100 ft deep in several places. The sound almost splits the island in two. While often described as the "only fjord on the East Coast", it lacks the extreme vertical relief and anoxic sediments associated with Norwegian fjords, and is now called a fjard by officials — a smaller drowned glacial embayment. Somes Sound was named for Abraham Somes, who was one of the first settlers on the island and had a home at the end of the sound in Somesville, the first village on the island.

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<Gallery widths="200px"> Image:LaneFitzHughEntranceOfSomesSound.jpg|**Entrance of Somes Sound**, Mount Desert Island, Maine (1855) by [Fitz Hugh Lane](https://bliptext.com/articles/fitz-hugh-lane) File:Valley Cove, Somes' Sound, by B. Bradley.png|[Stereoscopic image](https://bliptext.com/articles/stereoscope) of Valley Cove, Somes Sound. (1870s) </Gallery>