The Shadow That Has Chased Climbers Off Scotland’s Second Highest Peak for 200 Years

In 1925, a distinguished professor of chemistry stood up at the Cairngorm Club and confessed something that shocked the room. Norman Collie — a man who had climbed in the Himalayas, the Rockies, and the Alps without flinching — said that something on Ben MacDhui had terrified him so completely that he had fled, blindly, through the mist, convinced something enormous was gaining on him.

He had never gone back alone. He never would.

The Mountain That Keeps Its Secrets

Ben MacDhui rises to 1,309 metres in the heart of the Cairngorms — Scotland’s second highest summit, cold, remote, and ringed by one of the most ancient mountain plateaus in Europe.

On clear days, walkers reach the summit in their hundreds. But Ben MacDhui has a quality that sets it apart from other Scottish peaks: an unease that even seasoned climbers struggle to explain.

Scots have known it for centuries. They call it Am Fear Liath Mòr — The Big Grey Man.

What Norman Collie Heard in the Mist

Collie’s encounter in 1891 is the most famous, but he kept it private for thirty-four years. He had been descending the summit alone in thick fog when he became aware of something following him.

Every few of his steps, he heard another — heavier, longer-strided, impossible to account for. He counted. For every three steps he took, one great crunch came from behind.

The terror that overtook him was unlike anything he had felt in thirty years of mountaineering. He did not walk away. He ran — for miles — until he reached Rothiemurchus Forest and the feeling faded.

The room at the Cairngorm Club was silent when he finished.

You Would Not Be the First

Collie was not alone in his experience, not by a long way. Dr A.M. Kellas — the physiologist who pioneered research into altitude and oxygen — reported that he and his brother had clearly seen a giant figure on the summit plateau.

Peter Densham, a mountain rescue worker who spent years on the Cairngorm plateau during the Second World War, described a presence so overpowering that he had to fight the urge to run directly off the cliff edge.

Frank Smythe — one of the most accomplished Everest climbers of his generation — left a written account of the evil he sensed on Ben MacDhui, a force he described as something deliberate and aware.

These were not impressionable tourists. They were scientists, soldiers, and professional climbers. Men trained to trust their senses in the mountains.

What It Might Be — and Why That Doesn’t Quite Settle It

Rational explanations exist, and they are genuinely compelling.

Infrasound — low-frequency sound waves generated by wind passing over rocky ridges — can cause feelings of dread, irrational fear, and even hallucinations at certain frequencies. The Cairngorm plateau, with its vast open bowl and unique geology, may produce exactly those conditions.

Then there is the Brocken spectre. When a climber stands on a summit with mist below and sunlight behind, their shadow is projected onto the cloud as a massively enlarged figure — sometimes encircled by a rainbow halo. Many sightings of great grey shapes on summits may be nothing more than the climber’s own shadow, magnified beyond recognition.

And yet. Infrasound does not explain footsteps. Brocken spectres do not follow you.

The Gaelic Name Changes Everything

The detail that serious researchers always return to is this: Am Fear Liath Mòr is not a Victorian invention.

The Gaelic name — The Big Grey Man — predates Norman Collie’s account by generations. It lived in the oral tradition of Highland communities long before English-speaking mountaineers began reaching the summit. The locals already knew something was up there.

Whether that something is geology, folklore, or the mountain itself playing tricks on exhausted minds, it has shaped Ben MacDhui’s identity for centuries. The Cairngorm plateau is one of the last truly wild places in Britain. Perhaps it makes sense that it has kept something for itself.

The Draw of the Unknown

Ben MacDhui is accessible today. A challenging but well-walked route from Cairngorm ski centre leads to the summit in three to four hours. Most walkers come down reporting nothing more unsettling than cold wind and magnificent views across the Grampian plateau.

But spend a night at the summit shelter. Descend alone in the mist. Listen carefully to the silence.

Scotland has always held space for things that resist explanation — kelpies in the lochs, spirits in the glens, stories that outlast the generations that first whispered them. If you want to understand those stories, a road trip through the Scottish Highlands that takes in the Cairngorms plateau is one of the most rewarding routes on the mainland.

And if you want to explore the creatures that haunt the edge of Scottish imagination, Scotland’s most famous myths and legends are a deeper rabbit hole than most visitors expect.

Ben MacDhui will be there. So, possibly, will Am Fear Liath Mòr.

Bring a friend.

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