Spar Island is a small sandbar in

Mount Hope Bay Mount Hope Bay is a tidal estuary located at the mouth of the Taunton River on the Massachusetts and Rhode Island border. It is an arm of Narragansett Bay. The bay is named after Mount Hope, a small hill located on its western shore in what is ...

in eastern

Rhode Island Rhode Island (, like ''road'') is a state in the New England region of the Northeastern United States. It is the smallest U.S. state by area and the seventh-least populous, with slightly fewer than 1.1 million residents as of 2020, but it ...

. The island is more or less a sand bar, and is made up entirely of an intertidal zone. A small portion is visible at high tide, expanding by about 4 times that size at low tide.

References

Islands of Rhode Island Landforms of Bristol County, Rhode Island Coastal islands of Rhode Island {{RhodeIsland-geo-stub