The Thousand Islands stretch across the Saint Lawrence River like a natural crown jewel, where pristine waters meet rocky shorelines and Victorian-era mansions emerge from emerald forests. This archipelago of 1,864 islands—from sprawling estates to single-tree outcroppings—offers a timeless escape into a landscape where the border between Canada and the US dissolves into pure natural beauty. Whether you're island-hopping by boat, exploring the romantic ruins of Boldt Castle, or strolling Alexandria Bay's waterfront, you'll find yourself enchanted by a region that balances refined leisure with genuine outdoor adventure.
Key Attractions
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Alexandria Bay
Lebovich, Bill / wikimedia (Public domain)
Boldt Castle
Unknown / wikimedia (Public domain)
Thousand Islands Skydeck at Greystone Mansion
A 70-foot stone tower offering 360-degree views of the Thousand Islands archipelago and St. Lawrence River from atop a historic Victorian mansion in Alexandria Bay. This iconic observation point captures the scenic grandeur that makes the region perfect for romantic getaways and island-hopping adventures.
Photo by Surja Raj on Pexels
Itineraries Here
Planning a Trip to Thousand Islands (US side): FAQs
When is the best time to visit Thousand Islands (US side)?
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The best time to visit Thousand Islands (US side) is summer.
How many days do you need in Thousand Islands (US side)?
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Plan on about 3 days to cover Thousand Islands (US side)'s highlights at a comfortable pace.
How do you get to Thousand Islands (US side)?
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The Thousand Islands are best accessed via the northeastern shore of Lake Ontario. Alexandria Bay (the main hub) is a 4–5 hour drive from Toronto, 6–7 hours from Buffalo, and about 5 hours from Syracuse. The nearest major airports are Syracuse Hancock International (SYR, 1.5 hours away) and Toronto Pearson (YYZ, 2.5 hours). Highway 81 South and I-90 East are the primary routes; US Route 12 hugs the river and offers scenic driving.
What are the top things to do in Thousand Islands (US side)?
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Top attractions in Thousand Islands (US side) include Alexandria Bay, Boldt Castle and Thousand Islands Skydeck at Greystone Mansion.