Lac Saint-François
Inland lake · Area 355.5 km² · 11 harbours
Show on mapPlan route from Creg Quay
Lac Saint-François is an inland lake with no waterway to the sea (Canada). Area 355.5 km². Sailseer covers 11 harbours, including Creg Quay, Grey's Creek Marina, Hafen (Camerons Point), Hafen (Cornwall), Long Sault Marina.
Rules on the lake
St. Lawrence Seaway: The St. Lawrence Seaway from Montréal to Lake Ontario is operated by the Canadian St. Lawrence Seaway Management Corporation (five locks) and the US Great Lakes St. Lawrence Seaway Development Corporation (Snell and Eisenhower). Pleasure craft in 2026 from 8 to 10 May and from 15 May to 18 October; the Canadian locks at fixed times with online booking, CAD 25 per lock (Beauharnois both CAD 50), Snell and Eisenhower on demand for USD 30 each. At least 6 m and 900 kg, not under sail, at most 35.5 m above the water, life jackets for everyone. The river is the border between Canada and the USA: boats only passing through do not report; anyone who lands or anchors in the other country reports at once (Canada to the CBSA, +1 888-226-7277; USA through the CBP ROAM app).
Harbours on the lake
Formalities
Frequently asked questions
Lac Saint-François: What rules apply to boats?
The St. Lawrence Seaway from Montréal to Lake Ontario is operated by the Canadian St. Lawrence Seaway Management Corporation (five locks) and the US Great Lakes St. Lawrence Seaway Development Corporation (Snell and Eisenhower). Pleasure craft in 2026 from 8 to 10 May and from 15 May to 18 October; the Canadian locks at fixed times with online booking, CAD 25 per lock (Beauharnois both CAD 50), Snell and Eisenhower on demand for USD 30 each. At least 6 m and 900 kg, not under sail, at most 35.5 m above the water, life jackets for everyone. The river is the border between Canada and the USA: boats only passing through do not report; anyone who lands or anchors in the other country reports at once (Canada to the CBSA, +1 888-226-7277; USA through the CBP ROAM app).
Lac Saint-François: How big is the lake?
Area 355.5 km².
Lac Saint-François: Which harbours are there?
Sailseer covers 11 harbours, including Creg Quay, Grey's Creek Marina, Hafen (Camerons Point), Hafen (Cornwall), Long Sault Marina.