It marks the southwestern entrance to Frenchman Bay, about four miles (2.5 km) south of Mt.
It is one of the five islands in the town of Cranberry Isles.
There are only three property owners on the island: two are private residence owners, with the rest of the island (over 75% of the total land) belonging to the National Park Service.
The station began in 1828 on the order of John Quincy Adams, to warn of the shoals around the Cranberry Isles and the sand bar running between Baker Island and Little Cranberry Island.
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