Safety
Is the GR20 dangerous?
"Is the GR20 dangerous? Have people died?" These are fair questions before you commit. The honest answer: the GR20 is Europe's most demanding trek, but it isn't "deadly" for anyone who walks carefully. The real danger is almost never the one you picture.
The essentials
Dangerous unprepared, safe prepared
Let's be clear: yes, the GR20 can be dangerous if you go about it badly — like all high mountains. No, it isn't a "trap" that kills careful walkers. Its deadly reputation comes mostly from one specific section, the Cirque de la Solitude, now closed and bypassed.
What actually injures people on the GR20 isn't the drops: it's the weather, fatigue and bad decisions. Almost everyone finishes without a serious incident — because they follow a few simple rules.
The GR20's number-one danger isn't the void, it's the thunderstorm. You never commit to a ridge in doubtful weather. Every reflex that matters is on the safety page — that's what gets you home.
Key nuance
"Hard" doesn't mean "dangerous"
The GR20 packs 182.4 km and about +11,220 m of ascent over rocky, technical, self-sufficient terrain. It's hard — probably the hardest GR in Europe. But an exhausting stage isn't a deadly one: difficulty and danger are two different things.
Danger shows up when difficulty meets a bad condition (storm, fog, wet rock) or an exhausted walker pushing on. And difficulty is managed upstream: by splitting the stages to your pace, starting early, and picking the right season. Dosed well, the effort stops being a risk.
The real risks
What actually injures, ranked by frequency
Here are the GR20's real dangers, in the order they matter — and the reflex that neutralises each one. None of them is about the "void": they're all manageable.
| Risk | Why it's the real danger | Level | The reflex |
|---|---|---|---|
| Storms & weather | Exposed ridges and violent, sometimes sudden afternoon storms | The #1 | Start early, watch the forecast, turn back if the sky builds — safety details |
| Falls & terrain | Polished slabs and scree; sprains and slips = the top evacuation cause | Common | Proper shoes, poles, care on wet rock — exposed sections |
| Dehydration & heat | Hot summers and water points spaced out on some stages | Underrated | Drink before you're thirsty, map the water points |
| Cold & altitude | The weather flips fast at 2,000 m; snow patches possible early season | Seasonal | A warm layer in the pack, check névés in June — the gear |
| Overestimating yourself | Pack too heavy, pace too fast, no fallback margin | The trap | Preparation, light pack, stages at your pace — prepare |
You'll notice none of these is inevitable: each is defused by a decision made before you leave or before you commit. That's the whole point of preparation.
The Cirque
The Cirque de la Solitude: closed since 2015
The GR20's "deadly" reputation largely rests on one place: the Cirque de la Solitude. In June 2015, a rockfall triggered by a violent storm killed seven people there. Since then the section has been closed and bypassed by a new route over the Pointe des Éboulis (2,607 m, the GR20's highest point).
In other words: the most dangerous passage in the GR20's history is no longer on the route. You don't cross the Cirque any more. Its exact status, and what the bypass changed, are detailed on the variants page.
Honesty
The GR20 isn't for everyone
Let's be honest: the GR20 isn't a stroll, and not everyone needs to do it. Far more exposed are those who set off without physical preparation, who underestimate the weather, who overload their pack, or who refuse to turn back when they should.
Conversely, a trained, well-equipped walker who reads the weather and accepts changing the plan runs a very low risk. If you're a beginner, aim for real preparation, split the stages — or even start with the southern half, less alpine, to find your legs before the north.
Cutting the risk
Bringing the danger down to almost nothing
The GR20 is made safe mainly by good reflexes, not luck. In short:
- Watch the weather every day and never commit to a ridge or slab in a storm.
- Start early to clear the high sections in the morning, before heat and storms.
- Split the hard stages to your pace — the planner recomputes your itinerary.
- Spot the escape routes before each stage, so you know where to bail.
- Light pack, proper shoes, a warm layer, enough water.
- In an emergency: 112 (call), 114 (SMS), Corsica mountain rescue (PGHM) +33 4 95 24 24 00.
Verdict
So, dangerous?
The GR20 is a high-mountain route to respect, not a deadly trap. Its difficulty is real, but it can be prepared for; its dangers are real, but they're defused by simple decisions. Prepare seriously, watch the sky, walk at your own pace — and "Europe's toughest trek" becomes mostly its most beautiful.