FreighterLog The record of Great Lakes shipping

Archive: January 2024 to December 2025, 28,207 passages. Seaway transits checked hourly. Last checked 2026-09-23 18:00 UTC — 14:00 EDT. NOAA publishes in quarterly batches, and the archive currently runs nine months behind.

Archive to December 2025 · Seaway checked 2026-09-23 18:00 UTC — 14:00 EDT

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.

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

All monthly logs →

Recorded passages per month at Straits of Mackinac. Months are UTC buckets, matching the archive's monthly source files. Select a bar for that month's log.

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

The most recent recorded transits of Straits of Mackinac, newest first.
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.

Monthly logs