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Piedra Blanca Lighthouse

Fl (2) White 10s🇲🇽MXOperational

Location & Light Range

About Piedra Blanca Lighthouse

Also known as: Piedra Blanca (Isla San Marcos)

Piedra Blanca is a 15-meter-tall square pyramidal skeletal metal tower with a gallery, standing on an islet at the northwestern corner of Isla San Marcos. This islet shelters a small anchorage and is located approximately 25 kilometers southeast of Santa Rosalía. The lighthouse emits a white flash every 10 seconds from a focal height of 16 meters, visible for 12.2 nautical miles. The site is open to visitors, though the tower itself is closed to public access. Access to the islet and its facilities is typically achieved by boat, with the nearest port, San Marcos, being 3.4 kilometers away.

Why it matters: This lighthouse is essential for mariners navigating to the small, sheltered anchorage on the northwestern tip of Isla San Marcos, serving as a key reference point in this remote coastal area.

Light & Optic

Characteristic Signature
Fl (2) White 10s
Flash Type
Flashing
Light Color
White
Flash Count
2 flashes
Interval
10s
Raw Code
Fl W 10s
Focal Height
16m
Geographic Range
12.2NM

Location

Country
🇲🇽Mexico
Sea Region
Located on an islet sheltering a small anchorage at the northwestern corner of Isla San Marcos, which is about 25 km southeast of Santa Rosalía.
Latitude
27.2417°
Longitude
-112.1062°

References & Identifiers

Nearest Port
San Marcos(3.4 km)
Admiralty No.
G3559
NGA No.
14706
ARLHS No.
MEX-013

Tower & Structure

Tower Height
15m
Tower Shape
square
Tower Color
white
Material
metal

Structure: square pyramidal skeletal tower with gallery

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 Piedra Blanca Lighthouse at night?+
Piedra Blanca displays the characteristic Fl (2) White 10s — 2 white flashes every 10 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 white color may indicate a specific sector or warning zone.
Which ports and harbors does Piedra Blanca Lighthouse guide vessels into?+
Piedra Blanca Lighthouse assists vessels approaching 3 nearby ports. The closest is Isla San Marcos at 1.5 NM to the SSE. Other ports served include Santa Rosalia (10.9 NM WNW), Mulege (22.1 NM SSE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Piedra Blanca Lighthouse still active and maintained?+
Yes, Piedra Blanca 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 Piedra Blanca Lighthouse?+
You can track vessels near Piedra Blanca 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.