Thousand Islands, Alexandria Bay

4.7
#1 of 7 in Parks in Alexandria Bay
The Thousand Islands constitute an 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 50mi 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 40sqmi 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 1ft2 of land above water level year-round, and support at least two living trees.
The Thousand Islands archipelago is located at the outlet of Lake Ontario at the head of the Saint Lawrence River. The region is bisected by the Canada-United States border and covers portions of Jefferson and St. Lawrence counties in the U.S. state of New York, in addition to parts of the United Counties of Leeds and Grenville and Frontenac County in the Canadian province of Ontario.
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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TripAdvisor Traveler Rating 4.5
528 reviews
TripAdvisor
  • I’ve been to different islands in my travels but this one was extraordinary because there’s lovely houses or buildings in every island other than a castle . The boat ride from Canada to Alexandria Bay...  more »
  • It should be on everybody's bucket list,from May to October,Thousand Islands is just the most beautiful and wonderful area to visit.It is about 120 miles long and has 1708 islands in the middle of the...  more »

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