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Green Island Preserve
Stonington, Maine
A small island preserve accessible from Stonington with a 0.4-mile easy loop trail. Known for an old swimming quarry in the harbor that was once a popular local spot. Limited info available — check before heading out, as public access to the island launch point has been uncertain.
Near Stonington Harbor0.4-mile easy loop, ~10 minOld quarry swimming hole5-star Google rating, 3 reviewsAccess by water (kayak launch access uncertain)