Cast off from Gananoque into the heart of the 1000 Islands, gliding past granite islets, Millionaire's Row and the turrets of Boldt Castle. Compare the best Gananoque boat tours, from a quick one-hour loop to a five-hour castle stopover, and book with free cancellation.
Updated 2026-07-01
Quick answer
Gananoque boat tours sail into the 1000 Islands on the St Lawrence, past Millionaire's Row and Boldt Castle. A 1-hour loop costs $29 to $30, the 3-hour cruise is $41, and the 5-hour trip stops at Boldt Castle long enough to go inside. The castle sits on Heart Island in United States waters, so that stop needs a passport even though the boat leaves from Ontario.
Key takeaways
Most Booked — 4,691 Reviews, 4.5★ Gananoque's Most-Booked 1000 Islands Cruise
Set sail from Gananoque into the heart of the 1000 Islands with live audio commentary along the St. Lawrence River. Choose a 1, 3, or 5-hour route — the longest option adds admission to the majestic Boldt Castle on Heart Island.
Real-time dates and prices for the Gananoque 1000 Islands cruise — pick the 1, 3 or 5-hour route and your day, and see live availability.
These Gananoque boat tours cover the full range of 1000 Islands cruises — from a quick one-hour loop through the densest cluster of islands to a five-hour sailing with a two-hour stopover at Boldt Castle on Heart Island. In between are three-hour narrated cruises past the St. Lawrence Seaway and scenic two-castle runs from Ivy Lea. Whether you want a short taster or a full day on the river, you'll find the duration, price and rating for each below. Prices are per person.
from $29Most Booked — 4,691 Reviews, 4.5★ Set sail from Gananoque into the heart of the 1000 Islands with live audio commentary along the St. Lawrence River. Choose a 1, 3, or 5-hour route —…
from $29Best Rated — 4.6★ Board at Ivy Lea, right by the 1000 Islands International Bridge, for a scenic two-castle cruise past Boldt Castle, Singer Castle and the tiny Zavikon Islands. There's no…
from $66Castle Landing Included This extended cruise from Gananoque includes a two-hour stopover to explore Boldt Castle on Heart Island, with castle admission included in the price. You'll cross into U.S. waters…
from $41Great for Families A narrated three-hour cruise past Boldt Castle, the St. Lawrence Seaway shipping channel and the 1000 Islands International Bridge. Indoor and outdoor seating, onboard refreshments and restrooms make…
from $30Quick & Budget-Friendly A quick one-hour loop through the densest cluster of the 1000 Islands, with video and audio commentary pointing out McDonald Island, Howe Island and the narrow channels between…
| Tour | Price | Rating | Book | Duration | Departs | Best for |
|---|---|---|---|---|---|---|
| Gananoque 1000 Islands Cruise (+ Boldt Castle option) | $29 | 4.5 ★ | Check | 1/3/5 hrs | Gananoque | The flexible all-rounder |
| Ivy Lea Scenic Two-Castle Cruise | $29 | 4.6 ★ | Check | 2 hrs | Ivy Lea | Castles without a border stop |
| 5-Hour Boldt Castle Stopover Cruise | $66 | 4.2 ★ | Check | 5 hrs | Gananoque | Exploring the castle ashore |
| 3-Hour Depths & Discovery Cruise | $41 | 4.2 ★ | Check | 3 hrs | Gananoque | A relaxed narrated cruise |
| 1-Hour Heart of the 1000 Islands Cruise | $30 | 4.4 ★ | Check | 1 hr | Gananoque | A quick taste of the islands |
A Gananoque boat tour can be a one-hour taster or the better part of a day, and the right one depends on how much time you have and whether you want to set foot on Boldt Castle. The one-hour cruise loops through the tightest cluster of islands right off Gananoque — the most scenery for the least time. The three-hour narrated cruise ranges wider, past the St. Lawrence Seaway shipping channel, Millionaire's Row and the 1000 Islands International Bridge, all from the deck. The five-hour cruise is the only one that actually lands: a two-hour stopover on Heart Island to walk through Boldt Castle itself. From Ivy Lea, a shorter scenic run takes in both Boldt and Singer castles without a border crossing.
Here's how the main Gananoque boat tours compare at a glance.
| Boat tour | Length | Lands ashore? | Best for |
|---|---|---|---|
| 1-hour Heart of the Islands | 1 hr | No | A quick taste of the islands |
| Ivy Lea two-castle scenic cruise | 2 hrs | No | Both castles, no passport |
| 3-hour Depths & Discovery | 3 hrs | No | A relaxed narrated cruise |
| Gananoque 1/3/5-hour cruise | 1–5 hrs | 5-hr only | Choosing your own length |
| 5-hour Boldt Castle stopover | 5 hrs | Yes — 2 hrs | Exploring the castle up close |
Boldt Castle is the reason many people take a Gananoque boat tour in the first place. In the early 1900s, hotel magnate George C. Boldt — proprietor of New York's Waldorf-Astoria — set out to build a 120-room, six-storey Rhineland castle on Heart Island as a monument to his wife, Louise. When she died suddenly in 1904, Boldt ordered all work stopped and never returned; the castle sat empty for 73 years before the Thousand Islands Bridge Authority began restoring it. Only the five-hour cruise stops here, giving you two hours to walk the grand hall, the tunnels and the gardens at your own pace. Because Heart Island sits in U.S. waters near Alexandria Bay, every passenger on the stopover cruise needs a valid passport (or NEXUS card) — there are no exceptions.
If you'd rather not deal with the border, the scenic cruises glide right past the castle for the photo without ever landing.
Even the cruises that never land pack the St. Lawrence River's greatest hits into an hour or two. Guides point out Singer Castle on Dark Island, built by the head of the Singer sewing-machine company, and the tiny Zavikon Islands, joined by what tour narrators cheerfully call 'the shortest international bridge in the world.' You'll pass Millionaire's Row, where Gilded Age families summered in rambling island cottages, and watch ocean-going freighters slide through the narrow St. Lawrence Seaway shipping channel. The 1000 Islands International Bridge arcs overhead, and between the big sights are hundreds of pine-topped granite islands — some barely big enough for a single cottage, others cradling sheltered anchorages like Half Moon Bay, where an open-air church service is held on the water each summer.
Most of the Gananoque departures are run by City Cruises on triple-decker sightseeing vessels.
Gananoque boat tours run daily from May through the end of October — the boats are hauled out for the Canadian winter, so there are no cruises from November to April. Peak season is July and August, when the weather is warmest and the islands are at their greenest, but it's also the busiest stretch, with the Boldt Castle stopover often selling out on weekends. Late June and early September are the sweet spots: warm, settled days with thinner crowds.
May and October cruises are quieter and cooler — bring a jacket, as it's noticeably breezier out on the open river — and early October adds the bonus of fall colour across the islands. Mornings are usually the calmest on the water; afternoons can pick up a light chop when the wind rises. Gananoque is an easy day trip from Kingston to the west and Brockville to the east, so a 1000 Islands sightseeing cruise slots neatly into a wider Ontario road trip.
One thing to note: these are daytime narrated cruises rather than a sunset cruise — the last departures leave in the late afternoon.
It depends on the cruise. Only the five-hour Boldt Castle stopover actually lands on Heart Island, which is U.S. territory — so every passenger on that cruise must carry a valid passport or NEXUS card, with no exceptions, and travellers from outside Canada and the U.S. may also need a visa and ESTA. Every other Gananoque boat tour stays on the Canadian side or simply cruises past the castle without stopping, so no passport or ID is required.
If you don't have a passport handy, the scenic cruises and the one- and three-hour narrated trips still give you the full sweep of castles and islands from the deck.
The cruise boats are big, stable, triple-decker vessels with both enclosed and open-air decks, restrooms and an onboard snack bar and coffee shop, so a 1000 Islands boat cruise is an easy, family-friendly trip for all ages and for wheelchair users. Sightlines are best from the open upper deck, but it's always cooler and windier out on the river than on shore — bring a light jacket or windbreaker even on a warm day. Sun reflects hard off the water, so pack sunglasses, a hat and sunscreen, and a small pair of binoculars is worth it for the castles and passing freighters.
On the five-hour castle stopover, wear comfortable shoes for walking the grounds and bring water; food and drink can be bought onboard but outside food is not permitted on some cruises.
Gananoque boat tours sail May through October only. Timing is about warmth, crowds and fall colour rather than whether the boats are running.
Temperatures are approximate daytime averages (°F) for Gananoque. It is always cooler and breezier out on the open river than on shore.
The landmarks that make a Gananoque boat tour worth it — most are visible from the deck of every cruise; only Boldt Castle can be explored ashore.
See the live map above for the Gananoque and Ivy Lea departure docks.
We did the five-hour cruise with the Boldt Castle stopover and it was the highlight of our Ontario trip. Two hours on Heart Island was just right to walk the castle and grounds, and the narration on the way there was genuinely interesting. Bring your passport — they check everyone.
The one-hour cruise was perfect with two young kids — enough time to see the castles and the little bridge without anyone getting restless. Great value and an easy walk from the Gananoque waterfront.
Took the Ivy Lea scenic cruise because we didn't have passports, and we still saw both Boldt and Singer castles beautifully. The guide's stories about Millionaire's Row made the whole thing.
The three-hour cruise was a relaxed afternoon — comfortable boat, open top deck, and a bar onboard. Watching a huge freighter pass in the Seaway channel was unexpectedly cool. Would happily do it again.
One-hour loops, three-hour narrated cruises, the five-hour Boldt Castle stopover and scenic two-castle runs from Ivy Lea — the full range of Gananoque boat tours, compared side by side.
We lay out real prices, ratings, durations and review counts so you can match the right 1000 Islands cruise to your budget and your time in Gananoque.
We tell you exactly which cruise lands at Boldt Castle and needs a passport, and which ones show you the castles from the deck with no border stop at all.
Most Gananoque boat tours can be cancelled free up to 24 hours before, so you can book early and keep an eye on the river forecast.
For most visitors the flexible 1, 3 or 5-hour Gananoque cruise is the best all-rounder, because you choose the route to match your day. If you want to actually walk through Boldt Castle, take the five-hour stopover cruise; if you're short on time, the one-hour loop still shows you the heart of the islands. Compare every Gananoque boat tour to match one to your day.
Only for the five-hour Boldt Castle stopover cruise, which lands on Heart Island in U.S. territory — every passenger needs a valid passport or NEXUS card, no exceptions. Every other Gananoque boat tour stays on the Canadian side or simply cruises past the castle, so no passport is required. The Ivy Lea scenic cruise shows you both castles with no border stop at all.
The Boldt Castle stopover cruise from Gananoque runs about five hours in total, which includes a two-hour self-guided stopover on Heart Island to explore the castle, the grounds and the tunnels. The narrated cruise there and back takes in Singer Castle, Millionaire's Row and the St. Lawrence Seaway. Check live dates and prices for the castle cruise.
The 1000 Islands cruise season runs daily from May through the end of October. The boats are hauled out for the Canadian winter, so there are no sailings from November through April. July and August are warmest and busiest; late June, early September and October are quieter, with fall colour on the islands in early October. Browse the tours to see current departure days.
The cruises on this page run from about $29 to $66 per person. The one-hour loop and scenic cruises start around $29–$30, the three-hour narrated cruise is about $41, and the five-hour Boldt Castle stopover — which includes castle admission — is around $66. Compare all the prices side by side before you book.
Yes. The cruise boats are large, stable triple-decker vessels with enclosed and open decks, restrooms and an onboard snack bar, and they're wheelchair accessible. The shorter one-hour and three-hour cruises suit young children best. If you need step-free access or have questions about a specific sailing, contact us and we'll help you pick the right cruise.