Canada's inland water network ranks among the most extensive in the world. For recreational sailors and powerboaters, the country offers thousands of kilometres of navigable rivers, canals, and lake routes — from the Great Lakes in the south to remote northern river systems. This guide focuses on the waterways most commonly used by recreational craft: the Rideau Canal, the Trent-Severn Waterway, and the Great Lakes system.

The Rideau Canal

The Rideau Canal, a UNESCO World Heritage Site, stretches 202 kilometres between Kingston on Lake Ontario and Ottawa on the Ottawa River. Built in the 1820s for military purposes, it is now maintained by Parks Canada and operates seasonally, typically from mid-May through mid-October depending on water levels.

The canal contains 45 lockstations with 49 locks. Most locks are manually operated using heritage equipment — a notable characteristic that distinguishes the Rideau from more industrialised canal systems. Craft with air drafts exceeding approximately 10.5 metres cannot transit certain portions due to fixed bridge clearances. Boaters should consult the Parks Canada waterway guide, available on the agency's website, before planning a passage.

Lock Procedures on the Rideau

Lockmaster stations are staffed during operating hours, generally from 8:00 a.m. to 8:00 p.m. in peak season. Boats queue above or below the lock and are directed in by lockstaff. Fenders and dock lines should be prepared before entering the chamber. A Parks Canada seasonal permit, purchased at the first lock or online, is required to transit the canal.

Clearance Notice: Maximum air draft for the Rideau Canal is approximately 10.5 metres at normal operating water levels. Some sections have lower clearances. Verify current conditions with Parks Canada before departure.

The Trent-Severn Waterway

The Trent-Severn Waterway runs 386 kilometres across Ontario from Trenton on Lake Ontario to Port Severn on Georgian Bay. It passes through the Kawartha Lakes district, traverses the watershed divide near Balsam Lake, and descends through the Muskoka highlands to Georgian Bay. The system includes 44 lockstations and two marine railways — unique hydraulic boat lifts at Kirkfield and Peterborough that raise and lower craft in water-filled chambers.

The Peterborough Hydraulic Lift Lock, completed in 1904, is the highest hydraulic lift lock in the world, raising vessels approximately 19.8 metres in a single operation. It remains a functioning lock and a designated National Historic Site.

Planning a Trent-Severn Transit

A full transit of the Trent-Severn typically takes between seven and ten days for a boat travelling at an average cruising speed. Most boaters anchor or moor at designated facilities each evening. Lockside parks operated by Parks Canada provide overnight mooring at many locations. The Parks Canada Boater's Handbook for the Trent-Severn Waterway lists facilities, overnight fees, and distance tables.

The Great Lakes

The five Great Lakes — Superior, Michigan, Huron, Erie, and Ontario — form the largest system of freshwater lakes by surface area in the world. Canadian waters cover significant portions of lakes Superior, Huron, Erie, and Ontario. For recreational sailors, the Great Lakes present open-water conditions comparable to coastal sailing, including significant wave heights and rapidly changing weather.

Charts and Navigation Aids

The Canadian Hydrographic Service (CHS), a branch of Fisheries and Oceans Canada, produces and maintains official nautical charts for all Canadian waters including the Great Lakes and inland waterways. These charts are available in paper and raster/vector digital formats through CHS-authorised distributors. The CHS also publishes Notices to Mariners, a regularly updated series of navigational amendments that recreational boaters transiting Canadian waters should review before departure.

For inland waterways, Parks Canada publishes its own operational waterway guides that supplement CHS charts with lock clearances, facility locations, and seasonal notices. Both sets of publications should be carried and consulted when transiting managed waterways.

Weather Considerations on the Great Lakes

Lake weather differs significantly from coastal forecasts. Afternoon thunderstorms are common throughout summer, particularly on Lake Ontario and Lake Huron. The Environment and Climate Change Canada weather forecast service provides marine forecasts for defined lake zones. The VHF Marine Weather broadcast on channel WX-1 or WX-2 is the primary real-time source for lake conditions and is standard equipment on most sailboats and motorboats.

Navigation Marks and the Lateral System

Canada follows the International Association of Lighthouse Authorities (IALA) Region B buoyage system on the Great Lakes and major inland waterways. Under this system, red markers are kept to starboard when returning from sea (or, on inland waterways, when proceeding in the direction of the current). Green markers are kept to port. The phrase "red right returning" is the common mnemonic.

On the Rideau Canal and Trent-Severn Waterway, channel markers and hazard buoys are maintained by Parks Canada. Their condition and placement may differ from the open lake system, and boaters should not assume navigational equivalence between the two.

Practical Preparation for Inland Passages

Before any inland passage, particularly on a managed waterway, the following steps are advisable:

  • Measure your vessel's air draft (mast height above waterline) before approaching any waterway with fixed bridges or overhead clearances.
  • Obtain the relevant CHS charts and the applicable Parks Canada waterway guide.
  • Review current Notices to Mariners for the route.
  • Check Parks Canada's website for seasonal opening dates and any operational restrictions.
  • Ensure all required safety equipment is aboard and meets Transport Canada standards for the vessel's length and operating area.
  • File a float plan with a responsible person onshore.

References and Further Reading