Wayfarrow

Duluth South Breakwater Inner Light

Lighthouse · St. Louis County, Minnesota

This is the tallest operating lighthouse in Duluth. It was completed in 1901. This lighthouse originally displayed a 4th order fresnel lens and which was rotate
This is the tallest operating lighthouse in Duluth. It was completed in 1901. This lighthouse originally displayed a 4th order fresnel lens and which was rotate · Pete Markham from Loretto, USA / Wikimedia Commons · CC BY-SA 2.0

Duluth South Breakwater Inner Light is a lighthouse in St. Louis County, Minnesota. Minnesota has 9 lighthouses on record at Wayfarrow, 4 of them in St. Louis County.

It was built in 1901, in the early 20th century, making it the 3rd oldest of the 8 in Minnesota with a recorded construction date; its light sits 69 feet above the water; the light characteristic is recorded as Fl W 5s (a white flash every 5 seconds), with a range of about 15 nautical miles; it guards Lake Superior.

Status check, 2026-11: The record's 1889 date belongs to the first tower; the current steel skeleton tower was built 1900–01 and first lit September 1, 1901, and sources give its height as 61, 67 or about 70 ft, so height is left null. Duluth South Breakwater Inner Light is listed on the National Register of Historic Places. It stands at 46.7787° N, 92.0920° W.

Key facts

Current structure built1901
Focal height69 ft
Light characteristicFl W 5s
Range15 nautical miles
Body of waterLake Superior
Heritage designationNational Register of Historic Places listed place
National RegisterListed
Coordinates46.77872, -92.09203

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Nearby places

Questions

Where is Duluth South Breakwater Inner Light?

Duluth South Breakwater Inner Light is in St. Louis County, Minnesota, at 46.7787, -92.0920.

How many lighthouses are in St. Louis County?

St. Louis County, Minnesota has 4 lighthouses on record at Wayfarrow.

Sources and licences

Facts marked "approximately" carry an uncertain date in the source. Text on this page is generated from the sources above; no encyclopedia prose is copied. Last updated 2026-11-05.