Gairlochy Lighthouse

Gairlochy Lighthouse is a small signal lighthouse in Gairlochy, Highland, Scotland, at the south-western end of Loch Lochy. It stands where boats leave the loch and enter the Caledonian Canal. It is not a tall coastal tower but a piece of working canal infrastructure, protected together with the neighbouring locks.

What is the lighthouse at Gairlochy?

The structure marks the canal entrance from Loch Lochy. Aerial photographs held by Canmore show it in the foreground beside the locks, with the Mucomir Cut running alongside, an artificial channel linking the loch to the River Lochy. The Highland Historic Environment Record also describes it as a signal lamp at the southern end of the loch. For a skipper, it is the cue that the locks and the canal are close.

What is the history of the site?

Thomas Telford designed the Caledonian Canal, and construction ran from 1803 to 1822. The oldest structure at Gairlochy is the regulating lock, finished in 1813. It could not handle the volume of water leaving Loch Lochy, so a second, western lock was added in 1844.

The River Lochy once flowed into the loch along the stretch now occupied by the canal. The Mucomir Cut was dug to separate the two, but it proved inadequate, and in 1834 the river burst its banks and flooded the lock. Today the lighthouse, the locks and the signal lamp form a single Scheduled Monument, SM5294, listed by Historic Environment Scotland.

What can you see here?

• two locks, east and west, with a swing bridge,
• the lighthouse at the loch end of the canal,
• the Mucomir Cut and views across Loch Lochy,
• boats working through the locks, especially in the sailing season.

The Gairlochy locks lower the water to a level section that runs to the top lock at Banavie, where the famous Neptune's Staircase begins.

How do you get there?

Gairlochy lies north of Fort William, about 11 km by road. A car or bike is the easiest way to arrive, and the area sits on the Caledonian Canal route. A towpath leads along the canal between Banavie and Gairlochy and is popular with walkers and cyclists.

When should you visit?

Boat traffic peaks in summer, when the locks are busiest with leisure craft. The lighthouse and its surroundings can be viewed all year. Bring clothing for changeable weather, as Highland rain can arrive even in the main season.

Frequently asked questions

Is Gairlochy Lighthouse a conventional sea lighthouse?

No. It is a small signalling structure marking the Caledonian Canal entrance from Loch Lochy, not a coastal light.

Is the site protected?

Yes. The lighthouse is part of Scheduled Monument SM5294 together with the locks and the signal lamp.

When were the Gairlochy locks built?

The regulating lock was completed in 1813 and the west lock in 1844.

Which canal meets the loch here?

The Caledonian Canal, designed by Thomas Telford and completed in 1822. It passes through Loch Lochy on its route between Scotland's east and west coasts.