Thousand Islands boat cruise: review
Gananoque: 1000 Islands Cruise & Optional Boldt Castle Entry
An archipelago most Toronto visitors never see
The Thousand Islands region — more than 1,800 islands scattered across the St. Lawrence River between Ontario and New York State — sits far enough from Toronto (roughly 3 hours by car) that it doesn’t get the same visitor volume as Niagara, but it offers something genuinely different: a scenic river cruise through a landscape of small, forested islands dotted with cottages, lighthouses, and one full-scale European-style castle. The cruise reviewed here departs from Gananoque, the region’s main tourism hub, and includes an optional stop or view of Boldt Castle on Heart Island.
| Where | departs Gananoque, St. Lawrence River |
| Cost | around 35-45 CAD base, 55-65 CAD with Boldt Castle entry |
| Time needed | 2-2.5 hours on the water, plus time in Gananoque |
| Getting there | roughly 3 hours by car from Toronto |
| Best time | June-September for full schedule; bring a passport for the castle |
What’s included and the Boldt Castle story worth knowing before you go
The base cruise departs from Gananoque and winds through a selection of the islands, typically running 2-2.5 hours with narration on the region’s history, the islands’ ownership patterns (many are privately owned, some no larger than a single cottage), and the story behind Boldt Castle itself — a six-story mansion built in the early 1900s by hotel magnate George Boldt as a gift for his wife, abandoned unfinished after her sudden death and left standing empty for decades before restoration efforts in the 1970s. It’s a genuinely striking, slightly eerie landmark, and the story adds real context to what would otherwise just be an impressive building glimpsed from the water.
Boldt Castle entry is typically sold as an add-on rather than included by default — check the specific listing carefully, since some cruise configurations only offer a view from the water while others include docking and a chance to walk the castle grounds and interior.
Price in CAD
Expect roughly 35-45 CAD per adult for the base cruise. With Boldt Castle entry added, total cost runs closer to 55-65 CAD. That’s a reasonable price for a multi-hour river cruise, and it compares favourably to similarly-scaled cruise experiences elsewhere in Ontario — the scenery here is genuinely distinct from lake or harbour cruises given the sheer density of islands passed in a relatively short time.
The border detail people miss
Boldt Castle sits on Heart Island, which is United States territory, despite being reachable by cruise boats departing from the Canadian side. If your itinerary includes docking at the castle, bring a passport — even though the cruise itself doesn’t involve a formal land border crossing, disembarking onto US soil for the castle visit requires proper identification, and operators generally require passengers to have one on hand for that portion of the trip. Cruises that stay entirely on the Canadian side of the river and only view the castle from the water don’t require this.
Who this is for
Travelers interested in a genuinely unusual landscape and a good story attached to a landmark get real value here — the Thousand Islands don’t resemble anywhere else covered on this site, and the region rewards a full day trip rather than a rushed stop. It also pairs naturally with a broader visit to Kingston, given the two destinations sit close together along the same stretch of the St. Lawrence — see the Kingston day trip from Toronto guide for combining both in one outing.
It’s a weaker fit for travelers with limited time who’ve already used their one big day-trip slot on Niagara or Muskoka, since the Thousand Islands sit roughly 3 hours from Toronto — one of the longer drives covered on this site — and don’t offer enough additional draw to justify a rushed same-day round trip on top of another major excursion.
Comparing the cruise formats
If Boldt Castle isn’t the priority and you’d rather focus purely on the scenic island-hopping aspect of the region, the highlights scenic cruise departing from Gananoque or Ivy Lea covers more open-water island scenery without the castle stop, typically at a lower price point:
Gananoque/Ivy Lea 1000 Islands highlights scenic cruiseFor travelers who want to see two of the region’s landmark structures rather than just Boldt Castle, the two-castle cruise from Ivy Lea adds Singer Castle on Dark Island to the itinerary, appealing if the castle-hopping angle is the main draw of your visit:
Ivy Lea two-castle 1000 Islands scenic cruiseThe three cruise options, side by side
| Cruise | Roughly | Castles | Best for |
|---|---|---|---|
| Boldt Castle cruise (this one) | 35-45 CAD, 55-65 with entry | Boldt Castle, optional entry | the signature single-castle experience with a strong story |
| Highlights scenic cruise | lower price point | none, or view-only | travelers who want island scenery without a castle stop |
| Two-castle cruise (Ivy Lea) | comparable to Boldt cruise | Boldt + Singer Castle | castle-hopping visitors who want both landmarks |
Singer Castle, the other landmark worth knowing about
Boldt Castle gets most of the attention, but Singer Castle on Dark Island — reachable on the two-castle cruise from Ivy Lea rather than this Gananoque departure — has its own distinct story: built in the early 1900s for a Singer Sewing Machine Company executive, it’s a smaller, more intact Rhenish-style castle with hidden passages and a working functioning interior rather than Boldt’s unfinished shell. If castle architecture and history are the main draw of your Thousand Islands visit rather than just the one iconic story, the two-castle option covers both landmarks in a single outing.
Practical tips
Book a morning departure if photography matters — the light across the river tends to be clearer and less hazy earlier in the day, and morning cruises are generally less crowded than the popular midday and early-afternoon slots in peak summer. Bring a light jacket even on warm days; the open water generates a steady breeze that’s noticeably cooler than inland temperatures.
If you’re combining this with a broader trip, the Thousand Islands day trip from Toronto guide covers realistic timing for the full round trip from Toronto, including whether it’s feasible as a single day or better split across an overnight stay in Gananoque or Kingston.
Is it worth it — the honest take
For the specific appeal of a genuinely unusual landscape and a well-told historical story, yes — this is one of the more distinctive cruise experiences covered on this site, and the region doesn’t get the tourist saturation that makes Niagara feel crowded in peak season. The main honest caveat is distance: at roughly 3 hours from Toronto each way, this isn’t a casual add-on to an otherwise packed itinerary, and it works best either as a dedicated day trip or as part of a longer eastern Ontario route that also includes Kingston.
Why the islands themselves are worth slowing down for
It’s easy to treat the Thousand Islands as a single photogenic stop en route to Boldt Castle, but the region’s real character shows up in the density and variety of the smaller islands the cruise passes along the way. Some are large enough for a full cottage compound with docks and boathouses; others are barely bigger than the single tree growing on them, technically counted in the region’s namesake tally only if they clear a minimum size and stay above water year-round (the actual count, verified periodically, comes in at more than 1,800).
Narration usually covers a handful of the more distinctive examples — islands split exactly down a property line by the international border, or ones with a single, deliberately tiny “world’s smallest” structure built as a local curiosity.
This density is what separates a Thousand Islands cruise from a typical scenic river tour: rather than long stretches of open water, the boat winds continuously between islands, channels and narrow passages, giving a constantly changing view rather than one that settles into a static backdrop. It rewards a slower, more attentive kind of sightseeing than a quick photo-stop attraction would.
Gananoque itself, before or after the cruise
Most cruises depart directly from Gananoque’s waterfront, and the town is worth a bit of time on either side of the boat trip. It’s a small, walkable lakefront town with a handful of local restaurants and shops geared toward the region’s boating and tourism economy, a reasonable spot for lunch before or after the cruise rather than rushing straight back toward Toronto or on to Kingston. If your schedule allows, budget an extra hour in town beyond just the cruise itself.
How to book
Book directly through the listing above, and decide upfront whether Boldt Castle entry matters enough to pay the add-on price — if you’re mainly after the scenery and the story from the water, the base cruise or the highlights-only alternative covers that at a lower cost. Bring a passport regardless of which option you choose, in case a last-minute itinerary change adds a castle stop.
Frequently asked questions about the Thousand Islands boat cruise
Is the Thousand Islands boat cruise with Boldt Castle worth it?
Yes for the region’s signature experience — the archipelago of over 1,800 islands and Boldt Castle’s unfinished-mansion story are genuinely unique among Ontario day trips, and seeing them from the water is the intended way to experience the region.
How much does the Thousand Islands cruise cost in CAD?
The base cruise runs roughly 35-45 CAD per adult; adding Boldt Castle entry brings the total closer to 55-65 CAD.
Is Boldt Castle entry included by default?
No — most listings sell it as an add-on option to the base cruise, so check the specific ticket to confirm whether castle entry is bundled or needs to be selected separately.
Do I need a passport for the Thousand Islands cruise?
Not for cruises that stay entirely on the Canadian side, but Boldt Castle sits on Heart Island in United States territory, so bring a passport if your itinerary includes docking there, even though the cruise itself doesn’t require crossing the border by land.
How far is Gananoque from Toronto?
Roughly 3 hours by car, making the Thousand Islands one of the longer day trips covered on this site — worth combining with a Kingston visit or an overnight stay if your schedule allows.
What’s the best time of year for the Thousand Islands cruise?
June through September offers the warmest weather and full operating schedules; late May and October provide a quieter, less crowded cruise with cooler temperatures and reduced departure frequency.
Should I choose the Boldt Castle cruise or the two-castle cruise?
If Boldt Castle’s unfinished-mansion story is the main draw, the Gananoque cruise reviewed here covers it directly. If you’d rather see two landmark structures in one outing, the two-castle cruise from Ivy Lea adds Singer Castle on Dark Island to the itinerary.
Can I combine the Thousand Islands cruise with a Kingston visit?
Yes — the two destinations sit close together along the same stretch of the St. Lawrence, and the Kingston day trip from Toronto guide covers combining both in a single outing, whether as a long day trip or an overnight stay.
