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Petersburg Borough Lighthouse Lighthouse

Fl White 10s🇺🇸USOperational

Location & Light Range

About Petersburg Borough Lighthouse Lighthouse

This reinforced concrete lighthouse, built in 1935, features a square cylindrical tower that stands 20.5 meters tall. The tower, painted white, is centered on the roof of a single-story keeper's house, with a black lantern topping the structure. Its white light emits two flashes every 10 seconds, visible for 14.2 nautical miles. The station was first established in 1902. The site is open to the public, but access to the tower is restricted. In 2011, it began serving as a summer base for whale researchers.

Why it matters: The lighthouse marks the entrance to Stephens Passage, a significant waterway for navigating the southern approach to Juneau.

Light & Optic

Characteristic Signature
Fl White 10s
Flash Type
Flashing
Light Color
White
Interval
10s
Raw Code
Fl W 10s
Focal Height
24.5m
Geographic Range
14.2NM

Construction & History

Year Built
1935
First Lit
1902
Heritage Status
National Register of Historic Places 2004

Significant events: station established 1902, 1999 grant for visitor access, 2004 ownership transferred to preservation group, 2004 added to National Register of Historic Places, 2011 became summer base for whale researchers, 2020 group reorganized as Five Finger Lighthouse Society

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
20.5m
Tower Shape
square cylindrical
Tower Color
black
Material
reinforced concrete

Structure: A 20.5m square cylindrical reinforced concrete tower with lantern, centered on the roof of a square 1-story concrete keeper's house. The tower is white concrete, and the lantern is painted black.

Location

Country
🇺🇸United States
Region
Alaska
Sea Region
small island in the entrance to the Stephens Passage on the southern approach to Juneau and about 40 mi (65 km) north northwest of Petersburg
Latitude
57.2712°
Longitude
-133.6298°

References & Identifiers

Nearest Port
Kake(21.0 km)
Admiralty No.
G6432
USCG No.
6-23280
ARLHS No.
ALK-007
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Frequently Asked Questions

How do mariners identify Petersburg Borough Lighthouse Lighthouse at night?+
Petersburg Borough Lighthouse displays the characteristic Fl White 10s. 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 white color may indicate a specific sector or warning zone.
Which ports and harbors does Petersburg Borough Lighthouse Lighthouse guide vessels into?+
Petersburg Borough Lighthouse Lighthouse assists vessels approaching 5 nearby ports. The closest is KAKE at 21.4 NM to the SSW. Other ports served include ANGOON (32.7 NM WNW), Tyee (32.8 NM WSW), PETERSBURG (35.1 NM SE), Petersburg (35.2 NM SE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Petersburg Borough Lighthouse Lighthouse still active and maintained?+
Yes, Petersburg Borough Lighthouse 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 Petersburg Borough Lighthouse Lighthouse?+
You can track vessels near Petersburg Borough 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.