A Military Canal Built for a War That Never Came, Now the World’s Longest Skating Rink

Nobody ever actually invaded along the Rideau Canal. That’s the strange fact worth sitting with: the entire 202-kilometer system between Ottawa and Kingston was built between 1826 and 1832 purely as insurance, a way to move troops and supplies without exposing them to American cannon fire along the St. Lawrence River, after the War of 1812 spooked British colonial planners. The invasion the canal was designed to survive simply didn’t happen again, and what’s left is one of the best-preserved 19th-century slackwater canal systems anywhere, still operating on largely its original masonry and manually-operated locks. UNESCO listed it in 2007 specifically because so little has been mechanized or replaced.

The engineering that still works today

Forty-seven locks carry boats through an 85-meter elevation change between the two cities, and most of them are still hand-cranked by Parks Canada staff using the same basic winch mechanisms as when the canal opened. That’s not nostalgia, it’s a deliberate preservation choice, and it means summer boat traffic moves at a genuinely slow, almost 19th-century pace. Kingston Mills, at the canal’s southern end, is the largest lock station on the system and worth a stop even if you’re not boating, since you can watch the process from the bank for free.

What it actually costs to use

If you’re bringing a boat through in 2026, timing matters financially. Parks Canada is running a “Canada Strong Pass” promotion from June 19 through September 7, 2026, during which lockage is entirely free, boaters get a sticker at their first lockstation and pay nothing to pass through. Outside that window, in the shoulder seasons (mid-May to mid-June, and September into mid-October), standard lockage permits apply, sold as single-day, six-day, one-way, or full-season passes. One catch worth knowing before you show up: permits are not sold online for 2026, only in person at the lockstations themselves, so budget extra time at your first stop rather than assuming you can pre-book digitally. Mooring fees apply separately even during the free-lockage period.

Winter: the feature everyone actually comes for

The Rideau Canal Skateway in central Ottawa turns roughly 7.8 km of the canal into what’s marketed, accurately, as the world’s largest naturally frozen skating rink. It typically runs from late December or New Year’s Eve into early March, but it is genuinely weather-dependent and closes on short notice when temperatures rise; the 2026 season, for instance, briefly shut in mid-February for a thaw before reopening, then closed for good in early March. Do not plan a trip around the Skateway without checking the NCC’s live status a day or two out. Climate variability has made the season noticeably shorter and less predictable over the last decade, so build slack into any winter itinerary rather than assuming a fixed window.

Skating the canal properly

Renting skates at the NCC’s Fifth Avenue or Dows Lake huts costs less than buying a day pass to most indoor rinks, and the surface is graded and swept daily by machines that resemble small Zambonis mounted on tracks, since regular ice resurfacing equipment would be too heavy for a frozen waterway. Ice thickness gets measured at multiple points along the 7.8-kilometer stretch every morning during the season, and any section reading below the safety threshold gets roped off immediately rather than left open with a warning sign. Locals skate to work along sections of it, commuting past the Rideau Centre and Confederation Park on blades instead of boots, which is as close as North America gets to the Dutch tradition of canal commuting. The classic snack is a BeaverTail, a flattened, fried pastry dusted with cinnamon sugar, sold from huts directly on the ice; expect long lines on weekend afternoons and shorter ones on weekday mornings. Warming huts with benches sit at roughly kilometer intervals, useful given how quickly extremities go numb once wind picks up over open ice. Anyone skating end to end should budget close to two hours round trip at a casual pace, longer with kids or rental skates that don’t fit quite right.

Ottawa’s lockstations and the Bytown Museum

The eight-lock flight beside Parliament Hill, connecting the canal down to the Ottawa River, is the most photographed stretch of the entire system and also the most convenient for visitors without a car, since it sits a short walk from the Rideau Centre and Byward Market. The stone building perched above the lowest lock is the Bytown Museum, housed in what was originally the commissariat building where canal construction funds and supplies were stored starting in 1827, making it the oldest stone building in Ottawa still standing on its original foundation. Inside, the exhibits trace the canal from Colonel By’s original survey through the labor conditions faced by Irish and French-Canadian laborers, many of whom died of malaria contracted in the swampy excavation sites near what’s now downtown Ottawa. Admission is inexpensive relative to other capital-city museums, and the upper floor gives an elevated view down the lock flight that photographs poorly from ground level but is genuinely worth the extra staircase. Staff at the lock station itself, distinct from the museum, will explain the hand-cranking process to anyone standing at the fence during an active lockage, and they’re generally happy to answer questions if you catch them between boats.

Smiths Falls: the other stop worth making

Smiths Falls sits roughly at the canal’s midpoint alongside Merrickville and functions as a working town rather than a preserved showpiece, with a combined lock station, detached lockmaster’s house museum, and a hydraulic lift lock that’s one of only a handful of its kind still operating in North America. The Rideau Canal Visitor Centre here, run by Parks Canada, is the single best orientation stop on the entire waterway for understanding how the lock system actually functions mechanically, with cutaway models and a working scale demonstration that make the hand-cranked winches at other stations easier to appreciate afterward. The town also anchors one end of a former Canadian Pacific rail corridor now used as a multi-use trail, and it sits close enough to both Ottawa and Kingston that day-trippers arrive by Via Rail and walk everything within an hour of the station.

Cycling the towpath

A largely continuous multi-use pathway parallels long stretches of the canal on the Ottawa side, running from downtown out past Hog’s Back Falls and connecting into the broader capital pathway network that eventually links toward Manotick. It’s flat, well-maintained gravel and paved surface in most sections, suitable for road bikes with reasonably wide tires rather than pure racing tires, and it gets heavy local commuter and jogger traffic on weekday mornings and evenings. Outside the capital region, the towpath becomes intermittent, and cyclists wanting to follow the canal’s full rural length toward Kingston generally end up combining short off-road segments with quiet parallel country roads, since a single unbroken trail doesn’t exist for the entire 202 kilometers. Bike rentals are widely available near Dows Lake and the Rideau Centre in summer, with docking-style share bikes also present downtown for shorter one-way rides.

Best season to visit

Early autumn, specifically mid-September through early October, tends to get overlooked in favor of the winter Skateway and the peak summer boating months, but it offers the clearest water reflections along the tree-lined stretches near Merrickville and Jones Falls, mild daytime temperatures for cycling the towpath, and noticeably thinner crowds at the Ottawa locks. Summer remains the only period when the full boating network is open end to end and every lockstation is staffed for pleasure-craft passage, so anyone planning to actually travel the canal by water needs to target June through Thanksgiving weekend in Canada, since most lockstations close for the season shortly after.

Getting there without a boat

Highway 416 connects Ottawa to the canal’s northern reaches and Highway 401 serves Kingston at the south end; driving between the two cities along the canal corridor takes roughly three hours if you’re not stopping. Via Rail runs regular service between Ottawa and Kingston with a journey time around two hours, a genuinely easier option than driving if you’re based in either city center and just want a day trip to a lockstation town like Smiths Falls or Merrickville. There’s no single continuous transit line following the canal itself; you’re combining short local transit hops with driving or cycling for the rural stretches.

A pairing most visitors miss

Merrickville, roughly the midpoint of the canal, gets a fraction of the visitors that Ottawa’s downtown locks do, but it has the best-preserved small lockstation town on the entire route, complete with a blockhouse museum built in 1832 as part of the original defensive plan. Stop here rather than only doing the Ottawa locks flanking Parliament Hill; it’s the difference between seeing the canal as a postcard backdrop and understanding why it was built as a defensive line in the first place.

The gotcha

Swimming in the canal is genuinely dangerous and not just a liability warning: boat traffic, cold water even in midsummer, and submerged structures near the locks have caused real injuries. Skate rentals and food huts along the Ottawa Skateway in winter are cash-and-card seasonal operations that close the moment ice conditions turn, so don’t count on amenities being open just because the ice looks fine from a distance; check official signage at the nearest NCC kiosk before venturing onto sections away from the main cleared path.