Welland Canal
Welland Canal Lock 4
Thorold, ON
Latitude / Longitude43.134983
-79.192133
-79.192133
Phone289-690-4344
VHF Channel14/15/17
Operating AuthorityNot listed
Last Reviewed2026-07-09
Great Loop Lock Reference
Welland Canal Lock 4
Reviewed planning reference for lock approach, communications, and float-plan preparation.
Lock Location
Zoomed-in location for this Great Loop lock reference.
Planning your Great Loop trip?
Use the free FPW Trip Planner to plot your route and stops, calculate mileage, travel time, fuel, reserve, and cost, and adjust speed and weather assumptions.
Plan My Trip Free
Free account required to save your trip.
About This Lock
Segment: Welland Canal. Route status: Great Lakes alternate when not using Trent-Severn/complete Erie route. Waterway Guide combines Locks 4-5-6 at same station; split here for one row per lock. Source: https://greatlakes-seaway.com/en/the-seaway/our-locks-and-channels/
Continue planning: Check Marine Weather, estimate your trip with the Boat Fuel Calculator, or review the Solo Boating Safety Guide.
Welland Canal Lock 4
