Guide
Watching ships at the Soo
Sault Ste. Marie viewing spots, how to tell when a lockage is coming, and what the passage record says about timing a trip.
Where to stand
Soo Locks Park, in downtown Sault Ste. Marie, Michigan, is a raised platform beside the lock walls, run by the Army Corps of Engineers, and as close as the public gets to a working lock anywhere on the lakes. A boat rises or falls in front of you, close enough to talk to the deckhands, and a lockage takes under an hour, most of it spent easing a long hull in and out. The walkway runs the length of the locks; the visitor center inside keeps seasonal hours. Know which chamber you want: the MacArthur is the smaller lock, and a thousand-footer can only use the Poe.
Knowing when something is coming
There is no published lock schedule. That is not an oversight: the Corps locks boats as they arrive, and the order changes with weather and traffic. What exists is a recorded vessel-passage line run by the Corps, listing what is expected; a scanner, for Soo Traffic working the boats through the river; and the platform itself, from which you can see the queue waiting below the locks. Our Soo log answers the other question, which boats use this lock and how often, by hour of day across two seasons.
Season
The locks close in mid-January and reopen in the second half of March. The archive shows the shape of that plainly: no Soo crossings at all in February 2024 and February 2025, and the last crossing of the 2024 season logged at 03:43 on 16 January 2025, downbound. Our first crossing of 2025 is timestamped 07:51 on 21 March, upbound. We infer season boundaries from the winter gap in the record rather than from the Corps' published dates, and the two do not always agree.
One local tip
The last week of March is the best ratio of boats to tourists in the year. The busiest single day in two years of our archive is 30 March 2024, with 17 crossings, a number matched by three other days. The boats that waited out the closure all move at once, and hardly anyone is watching. Dress for it; the river is still full of ice.
What you are most likely to see
The Soo recorded 5,467 crossings by 125 distinct vessels across 2024 and 2025, more than any chokepoint above the Straits. July 2025 ran about eleven a day. The most frequent callers were Lee A Tregurtha with 183 crossings, Edwin H Gott with 160 and Edgar B Speer with 154.
Cameras, centres and live positions
Other people's pages, opened and checked. FreighterLog embeds none of them and loads nothing from them: these are links, and each one goes to the operator's own site.
- Soo Locks Visitors Center Association ↗ — hours for the center inside the park, and what is open when
- BoatNerd live scanners and webcams ↗ — Soo Traffic on the scanner feed, and the river cameras
- BoatNerd live AIS map ↗ — what is above and below the locks right now