Stack Rock Fort

Stack Rock Fort stands on a small island in Milford Haven Waterway, constructed with limestone and granite materials to protect the harbor entrance.

The initial three-gun fort, built between 1850 and 1852, underwent substantial expansion from 1859 to 1871 to counter advancing naval technology threats.

The Grade II listed structure represents Victorian military engineering principles with its casemate design and strategic positioning in the Pembrokeshire waters.

The fort required a garrison of one officer and thirty men to operate its extensive artillery system of sixteen large guns and additional weapons.

The structure contains an original gun tower completely encased by later fortifications, creating a complex defensive system with multiple artillery levels.

Location: Herbrandston

Elevation above the sea: 3.6 m

Made from material: limestone, granite, concrete

Part of: Milford Haven Palmerston Forts, Pembrokeshire Coast National Park

GPS coordinates: 51.70270,-5.09173

Latest update: May 28, 2025 01:33