About

Plumfree Marsh, nestled on Grindstone Island, is part of the scenic Thousand Islands region on the US-Canada border. It lies within the jurisdiction of Clayton, a municipality in Jefferson County, New York. This area is renowned for its natural beauty and serves as a tranquil setting amidst the bustling waterways of the St. Lawrence River.

Grindstone Island, where Plumfree Marsh is located, is the fourth-largest island in the Thousand Islands archipelago. The marsh contributes to the island’s diverse ecosystem, offering a habitat for various flora and fauna. Its presence enhances the ecological significance of the island, making it a point of interest for nature enthusiasts and visitors exploring the rich landscapes of the Thousand Islands.

Island or Feature Name
Plumfree Marsh (of Grindstone Island)

Nationality
US

Centroid Lat/Long

Two-Minute Box

Location and description

Former, informal, or alternate names

Municipality
Clayton

County
Jefferson

Province / State
NY

Ports?

Book refs

1000islands.co ID #
923

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