Clachan Bridge

Clachan Bridge is a single-arched stone bridge that crosses Clachan Sound in Argyll and Bute, west of Scotland. It links the mainland to the island of Seil, 13 kilometres southwest of Oban. The hump-backed structure was designed by John Stevenson and built between 1792 and 1793 by Robert Mylne. Its high arch spans about 22 metres and rises 12 metres above the channel, allowing vessels up to 40 tonnes to pass at high tide. The bridge carries the B844 road and remains in use today under Historic Scotland’s care. The bridge is sometimes called the Bridge over the Atlantic, though Clachan Sound connects indirectly to the ocean via the Firth of Lorn and Seil Sound. This name has also been given to other bridges in similar settings. In 2026, plans to add traffic lights near the bridge sparked strong opposition from locals and councillors. A petition with three times the area’s population demanded their removal, arguing the lights would spoil the setting and endanger pedestrians. Wildlife thrives around the bridge, including fairy foxglove growing on its south wall. The narrow sound has trapped whales in the past, including a 24-metre whale in 1835 and 192 pilot whales in 1837. Visitors can walk across the bridge to enjoy views of the sound and its surroundings. The structure remains a quiet but striking link between land and sea.