Chokepoint
Straits of Mackinac
3,496 recorded passages by 99 distinct vessels between January 2024 and December 2025. Traffic here is described as westbound or eastbound; times on this page are Eastern time.
- 3,496 Passages recorded 24 months of archive
- 99 Distinct vessels
- 4.9 Passages per day Rough average over months with traffic
- 227 Busiest month August 2025
Busiest single day
Tuesday, 2 September 2025 — 14 passages
Counted on the local calendar date at this chokepoint. See the September 2025 log .
Viewing notes
The gate line runs north and south across the Straits, so crossings are labeled westbound into Lake Michigan and eastbound into Lake Huron. 3,496 crossings by 99 vessels. Unlike the Soo, this one never quite stops: February 2024 still recorded 26 crossings, because the Straits stay workable with ice assistance while the locks are shut. Mackinaw City and St. Ignace both put you on the water within sight of the bridge and the shipping channel under it.
Want to see what is out there now? BoatNerd has the live map. This page has what already passed.
Follow by RSS. Every crossing of Straits of Mackinac goes into a feed of its own, added when the next batch of the public AIS archive is processed. It is a file on this domain: no account, no email address, and nothing that reports back. Straits of Mackinac feed · all chokepoints
Monthly traffic
Winter gaps are real: when the locks close and the lakes trade stops, the record goes quiet. A short bar is a quiet month, not a missing one. The archive covers every month in the range.
Most recent passages
Last 120 in the archive
| Date | Local time | Vessel | Direction |
|---|---|---|---|
| 31 Dec 2025 | 08:49 EST | Paul R Tregurtha | westbound |
| 31 Dec 2025 | 06:13 EST | Samuel de Champlain | westbound |
| 31 Dec 2025 | 02:24 EST | Dorothy Ann | westbound |
| 30 Dec 2025 | 02:54 EST | John J Boland | westbound |
| 30 Dec 2025 | 02:26 EST | Algoma Buffalo | westbound |
| 29 Dec 2025 | 09:17 EST | STR Wilfred Sykes | westbound |
| 28 Dec 2025 | 19:49 EST | Stewart J Cort | eastbound |
| 28 Dec 2025 | 15:45 EST | Thunder Bay | westbound |
| 28 Dec 2025 | 13:11 EST | Edwin H Gott | westbound |
| 28 Dec 2025 | 12:22 EST | Edgar B Speer | eastbound |
| 28 Dec 2025 | 09:54 EST | Great Republic | westbound |
| 28 Dec 2025 | 07:20 EST | Burns Harbor | westbound |
| 28 Dec 2025 | 01:14 EST | Indiana Harbor | westbound |
| 27 Dec 2025 | 19:39 EST | John G Munson | westbound |
| 27 Dec 2025 | 12:29 EST | Sam Laud | westbound |
| 27 Dec 2025 | 07:52 EST | Lee A Tregurtha | westbound |
| 27 Dec 2025 | 06:28 EST | Calumet | eastbound |
| 26 Dec 2025 | 18:44 EST | American Integrity | eastbound |
| 26 Dec 2025 | 09:26 EST | Joseph L Block | eastbound |
| 25 Dec 2025 | 22:02 EST | Edgar B Speer | westbound |
| 25 Dec 2025 | 20:28 EST | Joyce L Vanenkevort | eastbound |
| 25 Dec 2025 | 19:28 EST | Herbert C Jackson | westbound |
| 25 Dec 2025 | 12:34 EST | Paul R Tregurtha | eastbound |
| 25 Dec 2025 | 03:30 EST | Stewart J Cort | westbound |
| 24 Dec 2025 | 13:51 EST | G L Ostrander | eastbound |
| 24 Dec 2025 | 12:37 EST | Manitowoc | eastbound |
| 24 Dec 2025 | 11:08 EST | Lee A Tregurtha | eastbound |
| 23 Dec 2025 | 19:51 EST | American Integrity | westbound |
| 23 Dec 2025 | 19:45 EST | John G Munson | eastbound |
| 23 Dec 2025 | 17:49 EST | Burns Harbor | eastbound |
| 23 Dec 2025 | 10:06 EST | Manitowoc | westbound |
| 23 Dec 2025 | 07:13 EST | American Century | eastbound |
| 22 Dec 2025 | 14:19 EST | Joseph L Block | westbound |
| 22 Dec 2025 | 13:07 EST | Joyce L Vanenkevort | westbound |
| 22 Dec 2025 | 08:36 EST | Paul R Tregurtha | westbound |
| 22 Dec 2025 | 08:30 EST | Manitowoc | eastbound |
| 22 Dec 2025 | 06:53 EST | Edgar B Speer | eastbound |
| 22 Dec 2025 | 02:03 EST | Walter J McCarthy Jr | eastbound |
| 21 Dec 2025 | 12:21 EST | Manitowoc | westbound |
| 21 Dec 2025 | 11:38 EST | John G Munson | westbound |
| 21 Dec 2025 | 08:09 EST | Lee A Tregurtha | westbound |
| 21 Dec 2025 | 03:51 EST | Calumet | westbound |
| 21 Dec 2025 | 03:24 EST | Herbert C Jackson | westbound |
| 20 Dec 2025 | 16:02 EST | STR Wilfred Sykes | eastbound |
| 20 Dec 2025 | 07:12 EST | G L Ostrander | westbound |
| 20 Dec 2025 | 01:16 EST | Clyde S van Enkevort | eastbound |
| 19 Dec 2025 | 15:49 EST | Burns Harbor | westbound |
| 19 Dec 2025 | 12:27 EST | American Century | westbound |
| 19 Dec 2025 | 09:32 EST | Edgar B Speer | westbound |
| 18 Dec 2025 | 10:01 EST | Walter J McCarthy Jr | westbound |
| 18 Dec 2025 | 09:36 EST | American Spirit | eastbound |
| 18 Dec 2025 | 05:19 EST | Algonova | eastbound |
| 18 Dec 2025 | 03:00 EST | Mesabi Miner | eastbound |
| 18 Dec 2025 | 00:49 EST | Atlantic Huron | eastbound |
| 17 Dec 2025 | 21:34 EST | John J Boland | eastbound |
| 17 Dec 2025 | 14:22 EST | Joseph L Block | eastbound |
| 17 Dec 2025 | 11:02 EST | Stewart J Cort | eastbound |
| 17 Dec 2025 | 10:51 EST | American Integrity | eastbound |
| 17 Dec 2025 | 10:07 EST | G L Ostrander | eastbound |
| 17 Dec 2025 | 03:11 EST | Olive L Moore | westbound |
| 16 Dec 2025 | 23:40 EST | Clyde S van Enkevort | westbound |
| 16 Dec 2025 | 12:00 EST | STR Wilfred Sykes | westbound |
| 15 Dec 2025 | 19:51 EST | James R Barker | eastbound |
| 15 Dec 2025 | 14:07 EST | Undaunted | westbound |
| 15 Dec 2025 | 09:18 EST | Atlantic Huron | westbound |
| 15 Dec 2025 | 07:51 EST | American Spirit | westbound |
| 15 Dec 2025 | 03:37 EST | John G Munson | eastbound |
| 15 Dec 2025 | 00:05 EST | Samuel de Champlain | eastbound |
| 14 Dec 2025 | 16:56 EST | American Century | eastbound |
| 14 Dec 2025 | 04:24 EST | G L Ostrander | westbound |
| 14 Dec 2025 | 04:14 EST | Algonova | westbound |
| 14 Dec 2025 | 02:27 EST | Mesabi Miner | westbound |
| 14 Dec 2025 | 02:23 EST | Great Republic | eastbound |
| 14 Dec 2025 | 01:46 EST | Lee A Tregurtha | eastbound |
| 14 Dec 2025 | 00:04 EST | Burns Harbor | eastbound |
| 14 Dec 2025 | 00:03 EST | Joseph L Block | westbound |
| 13 Dec 2025 | 23:21 EST | American Integrity | westbound |
| 13 Dec 2025 | 23:02 EST | Calumet | eastbound |
| 13 Dec 2025 | 22:34 EST | Algoma Niagara | eastbound |
| 13 Dec 2025 | 19:30 EST | Edgar B Speer | eastbound |
| 13 Dec 2025 | 10:13 EST | Indiana Harbor | eastbound |
| 13 Dec 2025 | 09:53 EST | John J Boland | westbound |
| 13 Dec 2025 | 09:06 EST | Undaunted | eastbound |
| 12 Dec 2025 | 16:11 EST | Herbert C Jackson | eastbound |
| 12 Dec 2025 | 12:33 EST | Walter J McCarthy Jr | eastbound |
| 12 Dec 2025 | 12:27 EST | John G Munson | westbound |
| 11 Dec 2025 | 21:59 EST | G L Ostrander | eastbound |
| 10 Dec 2025 | 17:57 EST | Lee A Tregurtha | westbound |
| 10 Dec 2025 | 16:05 EST | Stewart J Cort | westbound |
| 10 Dec 2025 | 13:52 EST | Mark W. Barker | eastbound |
| 10 Dec 2025 | 11:06 EST | Algoma Innovator | eastbound |
| 10 Dec 2025 | 10:05 EST | Herbert C Jackson | westbound |
| 10 Dec 2025 | 09:18 EST | Great Republic | westbound |
| 10 Dec 2025 | 08:50 EST | Samuel de Champlain | westbound |
| 10 Dec 2025 | 07:53 EST | Sam Laud | eastbound |
| 10 Dec 2025 | 03:42 EST | Edgar B Speer | westbound |
| 10 Dec 2025 | 03:26 EST | Dirk S. Vanenkevort | eastbound |
| 9 Dec 2025 | 23:34 EST | Joseph L Block | eastbound |
| 9 Dec 2025 | 17:25 EST | Joyce L Vanenkevort | eastbound |
| 9 Dec 2025 | 16:27 EST | Algoma Niagara | westbound |
| 9 Dec 2025 | 13:49 EST | Calumet | westbound |
| 9 Dec 2025 | 11:14 EST | Burns Harbor | westbound |
| 9 Dec 2025 | 10:44 EST | Northern Venture | westbound |
| 9 Dec 2025 | 09:27 EST | Algoma Buffalo | eastbound |
| 8 Dec 2025 | 22:06 EST | American Integrity | eastbound |
| 8 Dec 2025 | 21:20 EST | Paul R Tregurtha | eastbound |
| 8 Dec 2025 | 15:48 EST | Joyce L Vanenkevort | westbound |
| 8 Dec 2025 | 11:00 EST | Indiana Harbor | westbound |
| 8 Dec 2025 | 08:55 EST | Calumet | eastbound |
| 8 Dec 2025 | 08:05 EST | Samuel de Champlain | eastbound |
| 7 Dec 2025 | 23:31 EST | Walter J McCarthy Jr | westbound |
| 7 Dec 2025 | 21:55 EST | Algoma Innovator | westbound |
| 7 Dec 2025 | 17:36 EST | Manitowoc | eastbound |
| 7 Dec 2025 | 15:53 EST | American Mariner | eastbound |
| 7 Dec 2025 | 15:10 EST | Lee A Tregurtha | eastbound |
| 7 Dec 2025 | 12:58 EST | Mark W. Barker | westbound |
| 7 Dec 2025 | 10:29 EST | Algoma Buffalo | westbound |
| 7 Dec 2025 | 10:04 EST | Sam Laud | westbound |
| 6 Dec 2025 | 20:55 EST | Joseph L Block | westbound |
| 6 Dec 2025 | 18:37 EST | Dirk S. Vanenkevort | westbound |
Times are interpolated from AIS track samples, good to about fifteen minutes, and shown in Eastern time. A passage is a track crossing our gate line, not an official lock record.