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Grand Marais Lighthouse Lighthouse

Fl G 4s🇺🇸Minnesota, USInactive

Location & Light Range

About Grand Marais Lighthouse Lighthouse

Constructed in 1886, this lighthouse stands 10 meters tall with a focal height of 15 meters. Its white tower emits a green light. The light characteristic consists of a single white flash. The geographic range of the light is 12 nautical miles. This structure is no longer operational.

Why it matters: The original keeper's house, part of the lighthouse complex, now serves as the primary museum for the Cook County Historical Society, showcasing exhibits on regional history, industry, and culture.

Background
Grand Marais Light is located on the outer end of a breakwater on the shore of Lake Superior in the city of Grand Marais in Cook County, Minnesota, United States. It is located in USCG District 9. The tower was first lit in 1922 and is still operational. The original keeper's house on shore is now operated as the main museum of the Cook County Historical Society. The museum features exhibits on area history, industry and culture.

Light & Optic

Characteristic Signature
Fl G 4s
Flash Type
Flashing
Light Color
Green
Flash Count
1 flash
Interval
4s
Raw Code
Fl
Focal Height
15m
Geographic Range
12NM

Construction & History

Year Built
1886
Heritage Status
4

References & Identifiers

Admiralty No.
LLNR 16615
Wikipedia
Read on Wikipedia →
Wikidata
Q5594783 →
OpenStreetMap
View on OSM →

Tower & Structure

Tower Height
10m
Tower Color
white

Location

City
Minnesota
Country
🇺🇸US
Latitude
47.7451°
Longitude
-90.3381°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Grand Marais Lighthouse Lighthouse at night?+
Grand Marais Lighthouse displays the characteristic Fl G 4s — 1 green flash every 4 seconds. Each lighthouse has a unique flash pattern published in the List of Lights, allowing mariners to positively identify it and distinguish it from other navigation aids in the area. The green color may indicate a specific sector or warning zone.
Which ports and harbors does Grand Marais Lighthouse Lighthouse guide vessels into?+
Grand Marais Lighthouse Lighthouse assists vessels approaching 3 nearby ports. The closest is Taconite Harbor at 26.9 NM to the WSW. Other ports served include Grand Portage (29 NM ENE), Silver Bay (46.5 NM SW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Grand Marais Lighthouse Lighthouse still active and maintained?+
Grand Marais Lighthouse Lighthouse is currently listed as inactive. It may have been decommissioned, replaced by a different navigation aid, or temporarily taken out of service. Mariners should check the latest Notices to Mariners for current status.
How can I track vessels near Grand Marais Lighthouse Lighthouse?+
You can track vessels near Grand Marais Lighthouse Lighthouse in real time using MarineRadar. The platform shows live AIS positions of ships in the area, including vessel name, type, flag, speed, and course. Use the "Track Vessels Nearby" button on this page to open the live map centered on this lighthouse.