ALEXANDRIA BAY BOAT TOUR FIELD GUIDE
Two-Nation Tour: A Five- to Six-Hour Passage Through the Thousand Islands’ Mansions, Maritime Lanes and Historic Islands
A 5–6 hour cruise from Alexandria Bay that navigates both the U.S. and Canadian sides of the St. Lawrence Seaway, with guided landings at Rock Island Lighthouse and Boldt Castle.
Two-Nation Tour: A Five- to Six-Hour Passage Through the Thousand Islands’ Mansions, Maritime Lanes and Historic Islands.
Adventure brief
Two-Nation Tour: A Five- to Six-Hour Passage Through the Thousand Islands’ Mansions, Maritime Lanes and Historic Islands
The Two‑Nation Tour threads the Thousand Islands on the St. Lawrence Seaway from Alexandria Bay, a daylong cruise that alternates open-water passages past Millionaires Row and the Lost Channel with two guided land calls: Rock Island Lighthouse and Boldt Castle. Along the way the vessel slips beneath spans of the 1000 Island Bridge and through a working shipping channel where commercial vessels make their way between nations.
The Thousand Islands region, straddling the US-Canada border along the scenic St. Lawrence Seaway, offers a perfect setting for a memorable water-based adventure. This area is renowned for its over 1,800 islands, each boasting a unique character, from rugged rock formations to lush greenery. Adonsa Tours' Two-Nation Tour provides an immersive journey through this picturesque landscape, perfect for travelers craving rich history paired with stunning scenery.
Begin your cruise from the charming town of Alexandria Bay in New York, where the waters shimmer under the sun's rays. As you set sail aboard their well-equipped vessel, you'll pass majestic mansions—testaments to the area’s golden-age allure—and witness expert-guided stops at legendary sites such as Boldt Castle, an opulent retreat built by a millionaire in the early 20th century. Along the way, you'll explore the historic Rock Island Lighthouse, an iconic beacon guiding mariners for over a century, and take in panoramic views of the 1000 Island Bridge, an engineering marvel connecting the US and Canada.
Adonsa Tours not only emphasizes scenic beauty but also weaves in historical tales, making this cruise both visually stunning and culturally enriching. The tour's flexible itinerary allows for discovery of secret coves and lesser-known island spots, adding a sense of exclusivity to your journey. Ideal for families, couples, or solo adventurers, this cruise provides a unique perspective on the region’s natural and man-made wonders.
Overall, the Two-Nation Tour stands out in the Thousand Islands for its combination of scenic sailing, historical insights, and personalized hospitality. It’s a chance to appreciate the area's legendary status as a vacation haven while enjoying the tranquility of floating amidst breathtaking landscapes that define this region’s charm.
Route Schematic
Route & Key Stops
The cruise departs from Alexandria Bay and combines open‑water passage along the St. Lawrence with guided land calls at two historic islands and shoreline highlights.
Keewaydin State Park Marina (Departure)
Passengers meet and board at Keewaydin State Park Marina, located at 45165 NYS Route 12 in Alexandria Bay.
Rock Island Lighthouse (45 min)
A scheduled 45‑minute stop to explore the historic Rock Island Lighthouse and its museum.
1000 Island Bridge & St. Lawrence Seaway
The cruise travels under one of the Canadian and American spans of the 1000 Island Bridge system and runs through the active St. Lawrence Seaway shipping channel.
Boldt Castle on Heart Island (90 min)
A 90‑minute, on‑island visit to Boldt Castle; admission to the castle is included.
The outing is a single 5–6 hour daytrip noted as suitable for all ages; passengers should plan for an extended period on deck and on island walks and allow for operator route or timing adjustments.
Highlights
Outing Highlights
St. Lawrence Shipping Channel & 1000 Island Bridge
The route takes you into the St. Lawrence Seaway shipping channel and beneath one of the Canadian and American spans of the 1000 Island Bridge system, offering repeated views of commercial traffic that uses this major international route.
Rock Island Lighthouse & Boldt Castle Excursions
The tour includes two land excursions — a 45‑minute stop at Rock Island Lighthouse (with museum access) and a 90‑minute visit to Boldt Castle on Heart Island; admission to both attractions is included in the price.
Millionaires Row, Devil’s Oven and the Lost Channel
Cruising the islands reveals the lavish mansions of Millionaires Row, the hidden recesses like the Lost Channel and the Devil’s Oven — a noted local landmark tied to regional lore.
What the day feels like
What the Day Feels Like
Boarding in Alexandria Bay, you settle into a 5–6 hour itinerary that alternates ambient underway time on the St. Lawrence with close, guided visits ashore; narration frames the waterways, the region’s wealthy island estates and the engineering of the 1000 Island Bridge while the vessel provides steady access to both U.S. and Canadian shoreline points.
Suitability
Who it's for
Who this trip suits and why.
Practical planner
Details to review before reserving
Typical trip length is 5–6 hours.
Keewaydin State Park Marina — 45165 NYS Route 12, Alexandria Bay, NY 13607.
The listed price includes admission to Rock Island Lighthouse and Boldt Castle.
Consult the operator’s guidance for recommended items for a 5–6 hour cruise with short island walks.
Review cancellation policies before reserving.
Frequently asked questions
Planning Your Outing
How long is the Two‑Nation Tour?
The cruise lasts approximately 5–6 hours.
Where is the meeting point for departure?
Boarding is at Keewaydin State Park Marina, 45165 NYS Route 12, Alexandria Bay, NY 13607.
Which landmarks does the tour visit?
The itinerary includes stops at Rock Island Lighthouse and Boldt Castle and passes sights such as Millionaires Row, the Lost Channel and the Devil’s Oven, plus travel under the 1000 Island Bridge and through the St. Lawrence Seaway shipping channel.
Are admissions to the onshore attractions included?
Yes — the tour price includes admission to both Rock Island Lighthouse and Boldt Castle.
Does the cruise travel on both the U.S. and Canadian sides of the Thousand Islands?
Yes — the cruise navigates both the U.S. and Canadian sides of the Thousand Islands region on the St. Lawrence Seaway.
How this guide was prepared
This field guide is synthesized using verified supplier specifications, route descriptions, and destination data. Some booking links may generate affiliate revenue for ADV Guides.
- Verified: 2026-09-08T19:50:53.034Z
Some booking links may generate revenue for ADV Guides or The Adventure Collective.
Availability, pricing, schedules and operating details can change.
Trip details and contextual sources were reviewed by ADV Guides Editorial.