Thousand Islands
Ontario
The Thousand Islands is a remarkable North American archipelago consisting of 1,864 islands located where the Saint Lawrence River emerges from the northeast corner of Lake Ontario. Spanning approximately 80 kilometers downstream from Kingston, Ontario, this region straddles the Canada–United States border, with islands belonging to Ontario in Canada and New York State in the US. The islands vary dramatically in size, some covering over 40 square miles, while others are mere rocky outcroppings with just enough land to support trees. Geologically, the islands form part of the Canadian Shield’s Frontenac Arch, connecting to the Adirondacks, and the entire region has been recognized as a UNESCO World Biosphere Reserve since 2002. The Thousand Islands are renowned for their crystal-clear waters, enhanced by the presence of zebra mussels, allowing visibility of rocky bottoms at depths of up to 24 meters. The area is rich in history and natural beauty, featuring numerous shipwrecks, some visible from the surface. The region is accessible via the Thousand Islands Bridge connecting New York and Ontario, and is served by scenic routes like the Thousand Islands Parkway and Waterfront Trail. The largest nearby city is Kingston, Ontario, a cultural hub with a metropolitan population exceeding 170,000. The Thousand Islands offer a unique blend of serene natural landscapes, recreational opportunities, and historical intrigue, making it a captivating destination for nature lovers and travelers alike.
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Tip: The best time to visit the Thousand Islands is during late spring to early fall when the weather is pleasant and the islands are accessible by boat tours. Booking boat tours or cruises in advance is recommended, especially during peak summer months. Visitors can explore the area by car along the Thousand Islands Parkway or by cycling on the Waterfront Trail. Be mindful of navigation hazards if boating, as many rocks and shoals lie just below the water surface. Discounts may be available for seniors, families, and group tours. Early morning or late afternoon visits offer the best lighting for photography and quieter experiences.
Interesting facts
- •The Thousand Islands archipelago consists of exactly 1,864 islands, each with at least one square foot of land above water and supporting two living trees year-round.
- •The region was designated a UNESCO World Biosphere Reserve in 2002 due to its unique ecological and geological features.
- •Some shipwrecks in the area lie as shallow as 15 feet underwater and can be viewed from the surface.
- •The islands are geologically part of the Canadian Shield’s Frontenac Arch, connecting to the Adirondack Mountains in the USA.
History
The Thousand Islands region has a rich geological history as part of the Canadian Shield’s Frontenac Arch, which connects the Canadian Shield to the Adirondack Mountains.
The islands have been inhabited and used by Indigenous peoples for centuries before European settlement.
Over time, the area developed as a strategic location along the Saint Lawrence River, with settlements growing around Kingston and other towns.
In 2002, the region was designated a UNESCO World Biosphere Reserve, recognizing its ecological significance and biodiversity.
The introduction of zebra mussels in the 1990s notably improved water clarity, impacting the local ecosystem and tourism appeal.
Place Guide
Thousand Islands Bridge
A significant engineering feat connecting New York State and Ontario by crossing Wellesley Island, facilitating travel between the two countries and serving as a gateway to the archipelago.
Thousand Islands Parkway and Waterfront Trail
A scenic parkway and adjacent cycling trail along the Canadian side of the islands, offering picturesque views of the river and easy access to various island viewpoints and recreational areas.
Kingston, Ontario
The largest city in the region, serving as a cultural and population center with historical significance and amenities for visitors exploring the Thousand Islands.
