Thousand Islands landscape

Unforgettable Things to Do in Thousand Islands

Photo: Pierre André Leclercq / CC BY-SA 4.0 via Wikimedia Commons

Best time

June – September

Ideal stay

2–4 days

Fly into

ART · 0.8h drive

Permits

No permit needed

Daily budget

~$195/person (est.)

The Thousand Islands region is a vast playground where history, nature, and recreation intersect along the majestic Saint Lawrence River. With over 1,800 islands scattered across the border of New York and Ontario, the area offers an incredible diversity of experiences. Whether you are interested in exploring opulent Gilded Age mansions, navigating the labyrinth of narrow channels by boat, or hiking through pristine riverine forests, there is something to captivate every traveler. The unique geography of the granite archipelago provides a backdrop for endless adventure and relaxation.

Step 1

Touring Historic Castles and Mansions

One of the most iconic things to do in Thousand Islands is visiting the grand architectural marvels that sit atop the rocky outcroppings. Boldt Castle, located on Heart Island, is a must-see landmark. This six-story Rhineland-style castle was built at the turn of the 20th century as a testament of love, though it remained unfinished for decades. Today, visitors can wander through the restored halls, the power house, and the stunning Alster Tower. Accessible only by water, the castle provides a deep dive into the region's opulent past and offers some of the most photogenic views of the river.

Another significant historic site is Singer Castle on Dark Island. Originally known as 'The Towers,' this structure features mysterious secret passages and a massive clock tower. Guided tours take you through the intricate interior, sharing stories of the family that once called this island home. Both castles represent a unique era of American history where the wealthy elite built summer retreats in this remote northern landscape. Be sure to check the official ferry schedules and castle hours, as they vary depending on the season and weather conditions.

Thousand Islands Pier 01, illustrative photo

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Boldt Castle Tour

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Step 2

Boating and Water Exploration

To truly experience the Thousand Islands, you must get out on the water. Boat tours are the most popular way to see the archipelago, with various options ranging from large sightseeing vessels to private charters. These tours navigate through the 'Millionaire's Row,' passing by stunning private summer homes and navigating the narrow, winding channels between the islands. For a more intimate experience, consider renting a pontoon boat or a motorboat from one of the marinas in Clayton or Alexandria Bay, allowing you to find your own secluded cove for a day of swimming and relaxation.

Kayaking and canoeing are also excellent ways to explore the river's quieter corners. The Rock Island Lighthouse State Park is a popular destination for paddlers, where you can land your craft and climb the lighthouse for a panoramic view of the shipping channels. Paddling through the narrow passages near Wellesley Island allows you to see the diverse aquatic life and unique geological formations up close. Always wear a life jacket and stay mindful of the large freighter traffic that moves through the main shipping lanes, as these massive ships create significant wakes.

Thousand Islands.- Zavikon Island, illustrative photo

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Antique Boat Museum

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Step 3

State Parks and Hiking Trails

The Thousand Islands region is home to several spectacular state parks that offer a wealth of land-based activities. Wellesley Island State Park is the largest in the area, featuring miles of hiking trails that wind through forests, wetlands, and along rocky shorelines. The Minna Anthony Common Nature Center within the park provides educational exhibits and guided nature walks, making it an excellent stop for those looking to learn about the local ecosystem. The trails here vary in difficulty, providing options for casual strollers and seasoned hikers alike, with many paths leading to scenic overlooks of the river.

Cedar Point State Park is another favorite, known for its excellent fishing spots and sheltered swimming areas. For a more rugged experience, the Grindstone Island Nature Trail offers a chance to explore one of the larger, less-developed islands. These parks are not just for hiking; they are also prime spots for birdwatching, with chances to spot bald eagles, ospreys, and various waterfowl. When visiting the state parks, remember to check for any trail closures and ensure you have the appropriate permits if you plan on fishing or camping, as regulations are strictly enforced to protect the natural habitat.

Sunset from the Thousand Islands region in the St. Lawrence River DSCN0377 02, illustrative photo

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Wellesley Island State Park Hiking

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Step 4

Family-Friendly Activities and Museums

Families will find plenty of engaging activities beyond the water. The Antique Boat Museum in Clayton is a world-class facility that showcases the rich maritime history of the Saint Lawrence River. Children and adults alike will enjoy seeing the beautifully restored wooden speedboats, canoes, and cruisers. The museum even offers speedboat rides in a classic triple-cockpit mahogany boat, providing a thrilling way to experience the river's history. Interactive exhibits make it an educational and entertaining stop for visitors of all ages, perfect for a day when you want to take a break from the sun.

For a different kind of adventure, the Thousand Islands Zoo or local mini-golf courses in Alexandria Bay provide classic vacation fun. Many of the state parks also feature playgrounds and designated swimming areas with lifeguards during the summer months. If you are looking for a unique educational experience, the Macsherry Trail near Alexandria Bay offers a self-guided nature walk with signage explaining the local flora and fauna. These activities provide a well-rounded itinerary for families, ensuring that even the youngest travelers have a memorable experience in this scenic northern New York destination.

Step 5

Rainy Day Options and Scenic Drives

While the region is best enjoyed outdoors, there are several excellent options for rainy days. Exploring the shops and galleries in the village of Clayton is a great way to spend an afternoon. The town has a charming, walkable waterfront with boutique stores selling local crafts, artwork, and Thousand Islands-themed souvenirs. You can also visit the Thousand Islands Arts Center, which features rotating exhibitions and workshops. Many of the local wineries and distilleries along the Thousand Islands Seaway Trail offer tastings and indoor seating, providing a sophisticated way to wait out a passing storm while sampling regional flavors.

If the weather is gray but not torrential, a scenic drive along the Great Lakes Seaway Trail is highly recommended. This National Scenic Byway follows the shoreline of the Saint Lawrence River and Lake Ontario, offering numerous pull-offs with historical markers and breathtaking views of the water. You can drive from Cape Vincent, where the river meets the lake, all the way through Ogdensburg, stopping at small riverside hamlets along the way. This drive allows you to appreciate the vastness of the region from the comfort of your vehicle, making it a perfect activity for a day when the water is too rough for boating.