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Thousand Islands, Alexandria Bay

4.7
#1 of 7 in Parks in Alexandria Bay
Island · Nature / Park
The Thousand Islands (French: Mille-Îles) constitute a North American archipelago of 1,864 islands that straddles the Canada–US border in the Saint Lawrence River as it emerges from the northeast corner of Lake Ontario. They stretch for about 50 miles (80 km) downstream from Kingston, Ontario. The Canadian islands are in the province of Ontario and the U.S. islands in the state of New York.

The islands range in size from over 40 square miles (100 km2) to smaller islands occupied by a single residence, or uninhabited outcroppings of rocks. To count as one of the Thousand Islands, emergent land within the river channel must have at least one square foot (0.093 m2) of land above water level year-round, and support at least two living trees.
Take a look at our Alexandria Bay online travel route builder to schedule your visit to Thousand Islands and learn about what else to see and do during your holiday.
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Thousand Islands reviews

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TripAdvisor traveler rating 4.5
546 reviews
TripAdvisor
  • By U9210MU
    The St. Lawrence Seaway is beautiful and we enjoyed our visit immensely. Everyone in the motel, restaurants, boat tour, Boldt Castle, and wineries was friendly and helpful.  more »
  • By Darren5562
    1000 Islands is a must see area along the shared Canadian-USA border in the St. Lawrence River. Castles, mansions and adventure await you. There are many boat tours that offer cruises through the...  more »
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