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St. Louis Bay Range Common Rear Lighthouse

Oc Red 6s🇺🇸Duluth, USOperational

Location & Light Range

About St. Louis Bay Range Common Rear Lighthouse

This cylindrical skeletal tower stands 19 meters tall on a round pier within St. Louis Bay. Its red light flashes once every 6 seconds, providing a geographic range of 12.9 nautical miles. The structure is a triangular cylindrical skeletal tower mounted on a pier. The site is open to the public, but the tower itself is closed for access. It is located within the St. Louis Bay estuary, which forms part of the boundary between Minnesota and Wisconsin.

Why it matters: This light serves as the common rear range light for two separate shipping channels within the St. Louis Bay estuary, guiding vessels through this important commercial waterway.

Light & Optic

Characteristic Signature
Oc Red 6s
Flash Type
Occulting
Light Color
Red
Interval
6s
Raw Code
Oc R 6s
Focal Height
19m
Geographic Range
12.9NM

Location

City
Duluth
Country
🇺🇸United States
Region
Minnesota
Sea Region
St. Louis Bay, an estuary at the mouth of the St. Louis River, forming part of the boundary between Minnesota and Wisconsin.
Latitude
46.7344°
Longitude
-92.1470°

References & Identifiers

Nearest Port
Duluth(1.6 km)
USCG No.
7-16020

Tower & Structure

Tower Height
19m
Tower Shape
cylindrical

Structure: triangular cylindrical skeletal tower mounted on a round pier

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify St. Louis Bay Range Common Rear Lighthouse at night?+
St. Louis Bay Range Common Rear displays the characteristic Oc Red 6s. 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 red color may indicate a specific sector or warning zone.
Which ports and harbors does St. Louis Bay Range Common Rear Lighthouse guide vessels into?+
St. Louis Bay Range Common Rear Lighthouse assists vessels approaching 5 nearby ports. The closest is Superior at 1.5 NM to the NE. Other ports served include Duluth (2.7 NM NE), TWO HARBORS (25.7 NM NE), Floodwood (33.2 NM WNW), Hoyt Lakes (47 NM N). Mariners should consult the relevant chart for full approach and pilotage information.
Is St. Louis Bay Range Common Rear Lighthouse still active and maintained?+
Yes, St. Louis Bay Range Common Rear Lighthouse is currently operational. It is actively maintained and continues to emit its characteristic light signal for marine navigation. Most modern lighthouses are automated and monitored remotely by the national maritime authority.
How can I track vessels near St. Louis Bay Range Common Rear Lighthouse?+
You can track vessels near St. Louis Bay Range Common Rear 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.