The Thousand Islands from Toronto day trip takes you 3 hours east along the St. Lawrence River to one of Ontario’s most spectacular landscapes — the 1,864-island archipelago straddling the Canada-U.S. border, dotted with historic castles, millionaire’s mansions, and quaint riverside towns. Centred on the historic town of Gananoque (gateway to the islands), the Thousand Islands offer iconic boat cruises, historic Boldt Castle, scenic drives along the Thousand Islands Parkway, and access to the Thousand Islands National Park (Canada’s smallest national park). What follows is the practical version: which cruise operator to pick and how long to spend aboard, what the Boldt Castle passport rule actually means for your day, whether to base yourself in Gananoque or push on to Kingston, and how to make the three-hour drive worthwhile. It is one of the longer-haul options in our roundup of day trips from Toronto, and one of the most rewarding if you give it the time.
For the official 1000 Islands Tourism portal, see the official 1000 Islands tourism site.
Thousand Islands from Toronto: Quick Facts
Distance: 280 km east of Toronto.
Drive Time: 3 hours via Highway 401.
Best for: Scenic boat cruises, historic mansions and castles, riverside drives, kayaking, fishing.
Best Season: May through October (cruises operate; most attractions seasonal).
Length: Day trip is feasible but rushed; weekend recommended.
Thousand Islands from Toronto: Getting There
By Car
Highway 401 east from Toronto, exit at Highway 32 to Gananoque. The drive is a steady three hours of divided highway with services at Port Hope, Trenton, and the Kingston area if you need to stop. For the final 30 km, leave the 401 early at Lansdowne or Mallorytown and take the Thousand Islands Parkway instead — it runs right along the river with marked lookouts and adds only fifteen minutes. Driving is the only way to do this trip on your own timetable; if you are weighing the rental against the train, our guide to renting a car in Toronto covers the real costs for a day this far out.
VIA Rail
VIA Rail Toronto-Ottawa service stops at Brockville and Kingston. From Brockville, taxi or rental car to Gananoque (15 minutes). From Kingston (1 hour west of Gananoque), taxi or rental.
Bus Tours
Several Toronto-based tour operators offer Thousand Islands day trips, including bus + cruise packages. Cost: $100–$200 per person.
Parking & Arrival
Gananoque keeps free and paid parking near the City Cruises dock on Water Street; on summer weekends the closest lots fill by mid-morning, so an early arrival pays off twice over. The town itself is small and walkable once you are parked, with the cruise dock, several restaurants, and the main shops all within a few blocks. If you are continuing to the Skydeck or the Parkway afterward you will want the car anyway, so do not stress the exact lot — just leave Toronto early enough to be on the water before the midday rush.
Thousand Islands from Toronto: Boat Cruises
The boat cruises are the headline Thousand Islands experience, and the choice of operator matters more than first-timers expect. Gananoque is the main departure point and offers the widest range of trips; Rockport, fifteen minutes east, runs smaller and often less crowded boats; and Kingston-based operators reach the islands from the western end. The single decision that shapes your whole day is whether you want a quick loop, a narrated three-hour cruise past the grand homes, or the long Boldt Castle run that crosses into U.S. waters. The sections below break down each option.
City Cruises Gananoque
The oldest and largest cruise operator, formerly Gananoque Boat Line. Triple-decker, all-aluminum vessels with on-board restrooms, coffee shops, bars, and refreshment areas. Multiple cruise options:
1-Hour Sightseeing Cruise: ~$30 adult. Quick overview of Gananoque-area islands.
3-Hour Signature Cruise: ~$60 adult. Views of Boldt Castle, Millionaire’s Row, and cottages along the St. Lawrence. Includes lunch options.
5-Hour Boldt Castle Stopover Cruise: ~$80 adult plus $20 castle admission. Includes 2-hour stopover to tour Boldt Castle on Heart Island (U.S. side; passport required).
Cruises operate daily May through October. Departures every 60–90 minutes.
Rockport Boat Line
Smaller operation departing from Rockport (15 minutes east of Gananoque). 5-hour Boldt Castle cruises and 1-hour Lost Channel cruises.
Which Cruise Should You Pick?
For a day trip out of Toronto, the three-hour Signature cruise hits the sweet spot: long enough to reach Millionaire’s Row and the prettiest channels, short enough to leave the afternoon free for the Skydeck or a riverside lunch. Choose the one-hour loop only if you are arriving late or travelling with restless young children. Save the five-hour Boldt Castle stopover for a day when you have your passport, an early start, and no plans to be back in the city before evening — clearing U.S. customs on Heart Island and touring the castle is genuinely worth it, but it consumes the whole day. Whatever you book, aim for a morning departure: afternoon winds can pick up on the open water and the light is better for photos earlier in the day.
Thousand Islands from Toronto: Top Attractions
Boldt Castle
Heart Island, U.S. side. Hotel mogul George C. Boldt built the 6-storey, 120-room castle in 1900–1904 as a love token for his wife. After her death in 1904, construction stopped; the castle stood abandoned for 73 years before partial restoration. Now operates as a tourist attraction.
Cost: ~$20 admission plus boat cruise from Gananoque (5-hour stopover cruise).
Passport Required: The castle is on the U.S. side; you’ll need a valid passport or NEXUS card to clear customs.
Crossing to Boldt Castle: What to Know
Because Heart Island sits on the U.S. side of the border, the stopover cruise is technically a border crossing. Everyone aboard needs a valid passport or NEXUS card — a driver’s licence will not do, and children need their own passports too. There is no separate customs line to wait in; processing happens through the cruise and on the dock, but anyone who has overstayed a previous U.S. visit or has an inadmissibility issue should sort that out before booking. Allow roughly two hours on the island, which is enough to tour the main castle, the Power House, and the Alster Tower (the “playhouse”). The grounds are pretty but the upper castle floors involve stairs, so factor that in for anyone with mobility limits. Admission to the castle (about $20) is separate from the boat fare and is collected on the island.
Singer Castle
Smaller historic castle on Dark Island (U.S. side). Less visited than Boldt; for serious castle enthusiasts.
Thousand Islands Parkway
40-km scenic drive along the St. Lawrence River from Brockville to Gananoque. Multiple lookouts, historic stops, and waterfront access.
Thousand Islands National Park
Canada’s smallest national park, spanning 24 islands. Camping, hiking, kayaking, and wildlife viewing. Visit Canadian-side islands accessible by boat from Mallorytown Landing.
1000 Islands Skydeck
120-metre observation tower on Hill Island (between Ontario and New York). 360-degree panoramic views of the islands and the Thousand Islands Bridge.
Cost: ~$15 adult.
Aqua Discovery Centre
Interactive science centre in Brockville exploring St. Lawrence River ecology.
Kingston
1 hour west of Gananoque. Historic limestone city with Queen’s University, Fort Henry National Historic Site, the Kingston Penitentiary tour, and an excellent restaurant scene. Often combined with Thousand Islands trips.
Thousand Islands from Toronto: Activities
Kayaking & Canoeing
The Thousand Islands are exceptional for kayaking. Multiple rental operations in Gananoque and Mallorytown Landing.
Fishing
The St. Lawrence is famous for muskie, walleye, and bass fishing. Multiple charter operations.
Cycling
The Thousand Islands Parkway has a dedicated cycling path along its 40-km length. Bike rentals in Gananoque.
Camping
Thousand Islands National Park, Charleston Lake Provincial Park, and multiple private campgrounds.
Stargazing
The 1000 Islands Dark Sky Preserve offers exceptional stargazing.
Thousand Islands from Toronto: Where to Eat
Gananoque Restaurants
Gananoque Inn & Spa Restaurant: Historic inn restaurant.
Tradewinds Tropical Bar & Grill: Casual riverfront.
Stones & Bones: Steakhouse.
Brockville & Kingston
Both have stronger restaurant scenes than Gananoque. Worth a stop if extending the trip.
Thousand Islands from Toronto: Where to Stay
Gananoque Inn & Spa
Historic Gananoque inn near the cruise dock. Spa, restaurant, river views.
1000 Islands Resort & Spa
Larger resort property near Gananoque. Pool, spa, multiple restaurants.
Boutique B&Bs
Multiple Victorian-era B&Bs in Gananoque and Brockville.
National Park Camping
Thousand Islands National Park offers boat-access island camping.
Thousand Islands from Toronto: Best Time to Go
The cruise season runs May through October and the experience changes noticeably across it. June and early July bring warm water, full cruise schedules, and the longest daylight for the drive home. Late September and the first half of October are the connoisseur’s pick: the maple-lined shore turns colour, the boats are quieter, and the air is crisp on the open decks — bring a layer, because it is cooler on the river than on shore. July and August weekends are the busiest and the only time you should pre-book a specific cruise departure. Outside the May-to-October window most boats and island attractions close entirely, so a winter visit is really just the drive and the Parkway lookouts. For a wider read on Ontario’s seasons before you commit to a date, our guide to the best time to visit Toronto lines up well with conditions out here.
Thousand Islands from Toronto: Day Trip Itinerary
7 a.m.: Leave Toronto.
10 a.m.: Arrive Gananoque. Park near the cruise dock.
10:30 a.m.: Board the City Cruises 3-hour Signature Cruise.
1:30 p.m.: Lunch at Gananoque Inn or Tradewinds.
3 p.m.: 1000 Islands Skydeck or scenic drive along the Thousand Islands Parkway.
4:30 p.m.: Drive back to Toronto.
7:30 p.m.: Arrive Toronto.
Frequently Asked Questions: Thousand Islands from Toronto
How far is Thousand Islands from Toronto?
280 km east of Toronto via Highway 401. About 3 hours by car.
When can you cruise the Thousand Islands?
Boat cruises operate daily May through October. Closed November through April.
Do I need a passport for Boldt Castle?
Yes — Boldt Castle is on Heart Island on the U.S. side. Valid passport or NEXUS card required for the cruise stopover.
Where do Thousand Islands cruises depart from?
Most depart from Gananoque (City Cruises) or Rockport (Rockport Boat Line). Kingston Tours also offers cruises from Kingston harbour.
How long is the Thousand Islands cruise?
1-hour sightseeing cruises, 3-hour Signature cruises, and 5-hour Boldt Castle stopover cruises are all available.
Can I do Thousand Islands as a day trip from Toronto?
Yes — with an early start, you can do a 3-hour cruise plus lunch and Skydeck, returning to Toronto by evening. Weekend stays are more relaxed.
What is the 1000 Islands Skydeck?
The 120-metre observation tower on Hill Island offering 360-degree panoramic views of the islands and the Thousand Islands Bridge.
Can I visit Thousand Islands National Park?
Yes — Canada’s smallest national park spans 24 islands. Boat access from Mallorytown Landing.
Is Kingston worth visiting?
Yes — Kingston is 1 hour west of Gananoque with Queen’s University, Fort Henry, the Kingston Penitentiary tour, and an excellent restaurant scene. Often combined with Thousand Islands trips.
Where should I stay in the Thousand Islands?
Gananoque Inn & Spa is the central historic option. The 1000 Islands Resort & Spa offers larger amenities. Multiple Victorian B&Bs available.
Plan Your Thousand Islands from Toronto Trip
The Thousand Islands from Toronto is one of Ontario’s most underrated day trips, and the scenery does the convincing. The 3-hour drive from Toronto delivers you to one of North America’s most scenic river archipelagos, with the iconic boat cruises, historic Boldt Castle, and the Thousand Islands Parkway scenic drive. For first-time visitors, the City Cruises Signature 3-hour cruise plus lunch and the 1000 Islands Skydeck makes a complete day trip. For weekend stays, combine with Kingston for historic limestone architecture and excellent restaurants. Bring your passport if you want to step onto Heart Island for Boldt Castle — the love-token mansion is one of Ontario’s most distinctive historical attractions.
If the eastern river country appeals, it pairs naturally with the wineries and beaches of Prince Edward County, about an hour back toward the city, for a full weekend loop. The complete day trips from Toronto roundup maps out the rest, and if this is your one big outing, Niagara Falls is the shorter, more famous alternative to the west.