Blacknor Fort

Blacknor Fort is a coastal fortification on the Isle of Portland with two gun emplacements and an observation post positioned along the cliffs overlooking the English Channel. The site spans across the clifftop with multiple structural elements visible from outside, though the grounds are now divided into private properties.

The fort was built between 1900 and 1902 to defend Portland Harbour during both World Wars with two 9.2-inch guns. It was an important defensive position for England's south coast during a period of heightened tensions between European powers.

The fort is connected to the Slapton Sands incident of 1944, when gunners witnessed hundreds of American soldiers drowning during Exercise Tiger. This tragic episode continues to shape how people understand the place and its role in the war.

The external fortification elements can be viewed from designated viewing points since the site is now private property. It is important to respect the boundaries of the private grounds and only explore from public vantage points.

The two original gun emplacements and observation station sit outside the main perimeter directly on the clifftop, forming a dramatic outpost above the sea. From this vantage point, sentries could monitor open water and spot approaching vessels and potential threats from great distances.

Location: Isle of Portland

Inception: 1900

GPS coordinates: 50.54360,-2.45381

Latest update: December 13, 2025 12:23