Dunglass Castle, Medieval castle in West Dunbartonshire, Scotland.
Dunglass Castle is a medieval fortress ruin perched on a rocky cliff overlooking the River Clyde in West Dunbartonshire. The structure consists of sandstone walls, a round tower, and a boundary wall that define the original defensive layout.
The fortress was built in 1380 as the principal stronghold of the Barony of Colquohoun. In 1569 it came under attack from soldiers loyal to Lord Fleming of nearby Dumbarton Castle, highlighting its strategic importance in the region.
The name derives from the Dunglassian family who held power here for centuries. The remaining stonework today reflects the medieval strength that once characterized this stronghold.
The ruins sit on elevated rocky ground right at the riverbank, so sturdy footwear is essential. Since the structures are listed as at-risk buildings in Scotland, visitors should exercise caution when exploring and respect any safety barriers in place.
Near the ruins stands an obelisk honoring Henry Bell, an early steamship pioneer. This memorial connects the castle's medieval past with the region's 19th-century maritime innovation.
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