Ben Nevis attracts around 150,000 walkers every year. Most will enjoy a challenging but straightforward day out. But the summit plateau of Britain's highest mountain is one of the most dangerous places in the Scottish Highlands.
The danger is not the walk itself. It's what happens at the top when the cloud rolls in. Understanding these risks before you set off could save your life.
Why the Summit Is So Dangerous
The summit of Ben Nevis is a broad, relatively flat plateau of shattered rock. In good visibility, it's easy enough to navigate. But when cloud descends which it does on roughly 300 days a year the plateau becomes a featureless grey world where every direction looks the same.
The critical danger is the North Face. The northern edge of the summit plateau drops away in a series of massive cliffs some of the highest in Britain, with vertical drops of up to 700 metres. In poor visibility, there is absolutely nothing to tell you that you're approaching the edge. No fence, no wall, no change in terrain. One moment you're walking on flat rock; the next you're falling.
Walkers and experienced climbers have walked off these cliffs. It is not something that only happens to beginners or the reckless. The natural tendency when descending in cloud is to drift northward or north-westward which takes you directly towards the cliff edge.
There are also serious hazards to the south of the summit. Five Finger Gully and Coire Eoghainn have caught out many walkers over the years. The danger is psychological as much as physical: climbers who know about the North Face cliffs instinctively drift left (southward) to stay away from them. But this uncalibrated drift is exactly what feeds people into Five Finger Gully. Its upper slopes feel gentle and inviting like you're on the right track down. But the gradient steepens gradually, funnelling you into blind drops and vertical rock bands. By the time you realise you're off route, it's often too steep to climb back up. This is why the 282° bearing exists it's mathematically calculated to thread you between the North Face and Five Finger Gully.
The Compass Bearings You Need to Know
These bearings are for the descent from the summit trig pillar to the top of the Pony Track. If visibility is poor, they are the only safe way off the mountain. You must carry a map and compass, and you must know how to use them before you set off.
Step 1: From the trig pillar, walk on a grid bearing of 231° for 150 metres. This takes you south-west, away from the North Face cliffs.
Step 2: After 150 metres, change to a grid bearing of 282°. Follow this bearing to safely exit the summit plateau and reach the top of the zigzags on the Pony Track descent.
Precision matters. A few degrees of error on these bearings can put you on the wrong side of the cliff edge or into a gully. These are grid bearings taken directly from the OS map. As of 2025, grid north and magnetic north are very close in Lochaber (the difference is roughly 1 degree west), so you can dial these bearings straight into your compass. But this changes over time check the current magnetic declination on your OS map or the NOAA calculator before your trip.
Navigating by Bearing: Trust Your Compass and Pacing
Knowing the bearings is only half the job — you also need to measure the 150 metres accurately in zero visibility. You can't estimate distance by eye in a whiteout. Before your trip, count how many double paces it takes you to cover 100 metres on flat ground. On the summit in deep snow and wind, add roughly 30–40% to that count.
At the 150-metre mark make the turn to 282°.
Essential Equipment
At a minimum, you need a detailed map we recommend the Harvey Ben Nevis Superwalker map and a reliable compass. Do not rely on your phone for navigation. Phone batteries drain rapidly in cold conditions, GPS signals can be unreliable on exposed summits, and a cracked screen in driving rain makes any app useless.
You should also carry a headtorch (conditions can deteriorate enough to slow you dramatically), spare warm layers, waterproofs, food, and water. The summit of Ben Nevis is typically 10–15°C colder than Fort William, with wind chill often making it feel much colder still.
What to Do If Things Go Wrong
If you become lost, disorientated, or injured on the mountain, stay where you are if it's safe to do so, there is a shelter on the summit which you can rest in until conditions improve. Do not attempt to find your own way down by heading downhill in a random direction this is how people end up in gullies, on cliff faces, or in serious trouble.
Call 999 and ask for Police, then Mountain Rescue. If you can't get a phone signal for a call, try sending a text to 999 but you need to have pre-registered for this service. Text "register" to 999 from your phone before you set off. Do this at the lodge before you leave.
When you contact Mountain Rescue, be ready to provide: your location (grid reference if possible), the number of people in your group, any injuries, what equipment you have, and all the phone numbers in your group.
Before You Set Off
Always tell someone where you're going, which route you plan to take, and when you expect to be back. If you're staying at Highwinds Lodge, let us know we'll keep an eye on the clock for you.
Check the weather forecast carefully. MWIS (Mountain Weather Information Service) provides detailed mountain-specific forecasts for the West Highlands. If the forecast shows poor visibility on the summit, seriously consider whether today is the right day or whether one of the many spectacular lower-level walks around Fort William might be a better choice.
We keep a Harvey Ben Nevis summit map at the lodge for guests, and we're always happy to chat about conditions and routes before you head out.