Discover the Thousand Islands: 3 Experiences You Shouldn't Miss

Two trees. That's all it takes-along with a piece of land that remains above water year-round-to officially qualify as an island in the Thousand Islands.

The result? An archipelago of 1,864 islands scattered along the St. Lawrence River between Ontario and New York State.

Just a 2.5-hour drive from Montreal, the Thousand Islands are a playground for outdoor enthusiasts, history lovers, and anyone seeking breathtaking scenery.

Turquoise waters weave between forested islands, elegant waterfront cottages, grand estates, and even fairy-tale castles.

Whether you admire the archipelago from the sky or explore it by boat or kayak, every perspective reveals a different side of this remarkable destination.

Here are three unforgettable ways to experience the Thousand Islands.

The Thousand Islands: More Than a National Park

The Thousand Islands stretch along the St. Lawrence River from Kingston to Brockville, Ontario, all the way to Alexandria Bay, New York.

Despite the name, there are 1,864 islands, not 1,000.

For more than 150 years, visitors have been drawn to the region's crystal-clear waters, wooded islands, charming riverside communities, and spectacular waterfront mansions. The archipelago is also part of the Frontenac Arch Biosphere Reserve, recognized by UNESCO.

Within this larger region lies Thousand Islands National Park, managed by Parks Canada.

Spread across more than 20 islands and several mainland properties, the park protects a portion of this unique ecosystem while offering hiking trails, campgrounds, beaches, and convenient launch points for exploring the islands by kayak or boat.

See the Thousand Islands from Above on a Helicopter Tour

If there's one experience that truly showcases the scale and beauty of the Thousand Islands, it's a helicopter flight.

From nearly 2,000 feet above the river, the archipelago unfolds beneath you in spectacular fashion.

The islands appear to float on water that shifts from brilliant turquoise to deep sapphire depending on its depth. From above, you'll spot the grand waterfront estates along Millionaires' Row, tiny islands occupied by a single cottage, bustling marinas, and narrow channels winding between countless islands.

Of course, you'll also enjoy iconic sights such as Boldt Castle. Flights range from 10 to 60 minutes, with each route offering a different perspective of the region.

As Kathy Macrae, Director of Sales and Marketing at 1000 Islands Helicopter Tours, told me, however, it's rarely the castle that people remember most. "People step out of the helicopter talking about the incredible shades of blue in the river, the feeling of flying, and the experience itself."

After taking the flight myself, I completely understand why.

Flying aboard a Robinson R44 helicopter, which accommodates up to three passengers, everyone enjoys unobstructed views regardless of where they're seated. Takeoff delivers an exciting rush before quickly giving way to an unexpected sense of calm.

For a few unforgettable minutes, the world seems to slow down. You realize just how small you are-and just how spectacular this archipelago truly is.

It remains one of the most memorable experiences I've had in the Thousand Islands.

Information & reservations: 1000 Islands Helicopter Tours

Cruise Through the Thousand Islands

To truly appreciate the Thousand Islands, you also need to experience them from the water.

Every turn reveals another breathtaking landscape while onboard commentary shares the fascinating history of a region once considered the summer playground of America's wealthiest families. The cruise passes beneath the Thousand Islands International Bridge, connecting Canada and the United States, before showcasing some of the area's most iconic landmarks.

Several cruises are available, but the most comprehensive itinerary includes a stop at Boldt Castle on Heart Island. Built by millionaire George C. Boldt as the ultimate expression of love for his wife Louise, the 120-room castle is now one of the Thousand Islands' most famous attractions.

Read also: Visiting Boldt Castle: Everything You Need to Know Before You Go

Explore the Thousand Islands by Kayak

After seeing the islands from the air and from the water aboard a cruise, there's one more way to truly connect with the archipelago: by kayak.

With nothing but the sound of your paddle gliding across remarkably clear water, kayaking offers an intimate perspective of the Thousand Islands.

You'll paddle between small islands, observe wildlife up close, and fully appreciate the area's natural beauty at your own pace.

Beneath the surface, you can often see underwater rock formations, schools of fish and, with a little luck, even a sunken shipwreck. While searching for ours, we actually had to ask for directions from a resident living on his own private island.

My recommendation? Rent a kayak for the day and pack a picnic. Although most islands are privately owned, several belong to Parks Canada and are open to paddlers. You can pull ashore, enjoy a swim, have lunch, and continue exploring whenever you're ready.

The water is generally calm, making kayaking suitable even for beginners. Simply remain aware of larger boats when crossing busy navigation channels.

Information & reservations: 1000 Islands Kayaking