Aiguille de la Grande Sassière

Date of your route : Sep 15, 2026
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : Yes

Taken in ideal conditions... Breathtaking views from the summit

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Date of your route : Sep 08, 2026
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : Yes

A lovely walk, with a magnificent view from the summit.
We’d brought crampons, which we didn’t end up needing, but I still think it’s worth carrying them in your rucksack, at least for the final climb, which, depending on the weather, can get very slippery. A friend was there 15 days earlier and actually used his.
Two ‘climbing’ sections that aren’t too difficult, and a final, very steep climb.

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Date of your route : Sep 18, 2026
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

I climbed the Grande Sassière for the fifth time on 14 September 2026, at the age of 68. On the 11th, it had snowed above 3,000 metres, but almost all of it had melted. However, there was still some ice or snow on the path at around 3,500 metres; it was possible to bypass the slippery sections, but it would have been better to have crampons. I set off at 8.40 am and arrived at 12.20 pm. On the way back, the ice had almost completely melted.
The icing on the cake: from the summit, we had a perfect view of a ibex dozing in the sun, in an inaccessible spot. I’d never seen one so high up before.
I cannot stress enough that, if in doubt, you should always (at least twice) take the left-hand path (on the way up), which bypasses the exposed sections.
I saw some young people running down the mountain. That’s dangerous, in my opinion. On Saturdays and Sundays, it gets very (too) crowded if the weather’s fine.
May the Madonna at the summit protect all those who climb up there.
Liguori

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Date of your route : Sep 04, 2026
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good
Very busy route : No

All the comments already posted are clear enough; I won’t add anything further.
I can just say to those who are thinking of doing it: don’t get discouraged at the foot of the final climb, because once you reach the summit, all that’s forgotten!!! Enjoy a wonderful climb up the Aiguille!!!

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Date of your route : Sep 07, 2026
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★☆☆ Average
Route interest : ★★★★★ Very good
Very busy route : Yes

Apart from the length of the route, it’s figuring out the best way to go that can be tricky. In fact, in many places, you can see several different tracks. And some of them are quite exposed (see the other comments). Personally, I had to change my mind twice after just a few metres.
Otherwise, is this perhaps the most stunning view of any hike in France? The Matterhorn, Monte Rosa, the Ecrins, Monte Viso, Mont Blanc… Incredible.

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Date of your route : Aug 27, 2026
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : Yes

A brilliant hike!
Do be careful of the WIND, though – don’t ignore the forecasts, as gusts of 60–70 km/h, like the ones I encountered today, make the hike more challenging (at the three or four slightly vertiginous sections and on the final ascent). As for the rest, everything is explained below (training, rain jacket, take the left-hand path at point 3, etc.). Thank you, and long live Viso Rando.

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Date of your route : Aug 30, 2026
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : Yes

An exceptional hike that you really have to work for!!!
We set off from the car park at 7.20 am and reached the summit at 11.35 am, walking at a leisurely pace.
Reaching the summit at 11.35 am was ideal for us as the final slope – a 150-metre climb with a 40 per cent gradient – had thawed out completely (we hadn’t brought any crampons). The day before, we’d spoken to two female hikers who’d been forced to turn back because the summit, at that altitude (3,745 m), hadn’t thawed out, there were patches of ice and they hadn’t brought any small crampons to fit under their boots.
You need to be in very good physical shape; don’t forget that this involves a 1,500-metre climb over 5.5 km – that’s no mean feat – and the slopes are very steep (11 km there and back).
The entire hike takes in exceptional scenery: views of Lake Tignes, the Vanoise in the distance, the Grande Casse, Lake Sassière, and, near the finish, you walk alongside the Sassière Glacier.
The view from the summit of the Aiguille is simply breathtaking: a 360-degree panorama of the Mont Blanc massif, the Italian glaciers in the distance, the Swiss peaks, the Vanoise… You really do feel as though you’re on top of the world!!!!!
The hike took just over 8 hours, including time spent taking photos and having lunch at the summit for about 1 hour; we were back at the car by 3.40 pm.
A walking stick and warm clothing are strongly recommended – sub-zero temperatures at the summit.

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Date of your route : Aug 27, 2026
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : Yes

An extraordinary high-mountain hike that’s not to be missed. First and foremost, a word to all those who are ‘showing off’ and writing that it isn’t complicated and has no specific difficulties! Are you serious? A 1,500-metre climb isn’t for everyone; it’s still a major effort, and if you’re not physically fit, FORGET IT – otherwise it’ll be your worst nightmare! A word of advice for those who are really prone to vertigo, which is my case: I managed it because the route follows a ridge: basically, as you climb, there’s a 1,000-metre drop on your right (horrifying!), but on your left is the glacier with a much smaller drop and a gentler slope, so it’s manageable—though you still have to overcome your fears on certain tricky sections (personally, I kept my eyes fixed on the left-hand side at all times). Another important point: make sure you don’t get it wrong and take the correct side of the ridge: to the LEFT of the ridge when ascending and to the RIGHT of the ridge when descending – I mistakenly followed two people in front of me and, before I realised it, found myself in trouble with an 800-metre drop below me... A very apt comment noted that if you find it’s becoming very risky, it means you’re not on the right track – in this respect, the real-time tracking on VISORANDO is invaluable, but remember: to the LEFT of the ridge when ascending and to the RIGHT of the ridge when descending. An extraordinary hike; you really feel as though you’re in the high mountains, the scenery is magnificent and the glacier is impressively large. The final climb is really, really steep but not dangerous. However, I’d recommend shoes with good, unworn crampons: if you’ve only got trainers, forget it – or if you don’t value your life, go for it! A fantastic view at the top, and be sure to take a lovely photo with the statue of the Virgin Mary at the summit for an unforgettable souvenir...

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Date of your route : Aug 01, 2026
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : Yes

We set off from the car park at 6.00 am in excellent weather conditions.
This walk isn’t particularly difficult, provided the weather’s on your side.
We came across loads of walkers heading up as we were coming down… too many… far too many…
The viewpoint at 3,745 metres is well worth the trip.

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Date of your route : Aug 17, 2026
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : Yes

A superb hike completed in 3 hours 51 minutes (at the age of 55!) in good conditions. Thanks to the heatwave across France, it was still 7 degrees at the summit, and the path leading up to the summit had had time to thaw out during the morning. It was very busy. You’ll need good walking boots and walking poles, and you mustn’t be prone to vertigo.

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Date of your route : Aug 12, 2026
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : Yes

We set off at 5.45 am from the car park and there were already quite a few people making their way up (about forty of them).
The elevation gain can be daunting, but there are several flat sections along the way where you can catch your breath.
I found that the first climb from the car park was more of a cardio workout than the final ascent. Yes, the last slope is very steep, and looks daunting from below, but if you breathe properly and take your time, you can do it in an hour, even taking short breaks at every hairpin bend. I was lucky enough not to experience any negative effects from the altitude (having been at 3,500 metres on the Grande Motte glacier the day before – perhaps that helped?).
There are some fairly steep technical sections where you need to use your hands and concentrate, as a fall could be very serious. For me, it’s these three or four sections that make up the real difficulty of the hike, as it’s not always clear which way to go and you can quickly find yourself taking a more dangerous route.
At point 2, be sure to take the path on the left! Few people choose it, but it’s much simpler and less complicated than the one on the right (and you’ll save time).
Even in summer, a pair of gloves will come in handy if wind is forecast; we had -3 during the last hour of the climb.
For this hike, you need to be physically fit, but you don’t need to be an athlete either. I do weight training five times a week but no cardio apart from hiking (so you don’t need to be able to run a 10km, as mentioned in some comments). However, you do need to have done several hikes before and be sure-footed.
The ascent took 4 hours, the descent 3 hours 30 minutes (including 30 minutes’ breaks) due to excruciating knee pain caused by the descent.

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Date of your route : Aug 07, 2026
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : Yes

No particular difficulties apart from the length and the final 100 metres of fairly steep ascent. The highlights of this hike: the significant elevation gain, the view at the top, and realising just how much the glaciers are melting. Didn’t see any animals apart from grasshoppers and butterflies. Glad I did it, but not sure I’d want to do it again.

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Date of your route : Aug 05, 2026
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : Yes

A 1,400-metre climb over less than 6 km.
Hike completed in late July 2026. Ascent took around 4 hours; descent took around 2 hours 50 minutes. The final section is challenging: gradients of 40 per cent, with possible breathing difficulties or headaches due to the altitude. There are a few tricky sections where you must take care not to slip. A magnificent hike, but one I would not recommend without a good level of fitness.

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I don’t consider myself a particularly keen sportsman at all, but I can run 15 km (at my own pace, of course – bearing in mind I don’t cover more than 8 km an hour). And I walk a lot; I recently covered 350 km in 16 days on the GR 34 in Brittany.

I’ve climbed to the summit of the Aiguille de la Grande Sassière twice (August 2024 and August 2025) and didn’t experience any particular difficulties – no shortness of breath or problems with the altitude…
The only difficulty I experienced was the section after the first plateau, where on one side there’s a 1,000-metre drop and on the other the glacier. I found myself looking down at my walking poles and shoes to better cope with a distinct feeling of vertigo…
The first time I reached the second plateau, I could see the path leading up the slope and wondered if I’d manage it, given that at times the gradient reaches 40 per cent!
But it only took me an hour to reach the summit, and a total of four hours from the start at the dam.
The views from the summit are truly breathtaking: Mont Blanc, the Grandes Jorasses, the Matterhorn, the Monte Rosa and Gran Paradiso massifs, the Grande Casse, the Grande Motte, Mont Pourri…
On my first attempt, after returning to my car, I set off again after a coffee break to complete a circular route around Lac de la Sassière, which added another two hours’ walking and 220 metres of elevation gain!
I was in top form that day! 👍

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Date of your route : Jul 26, 2026
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★☆☆ Average
Route interest : ★★★★★ Very good
Very busy route : Yes

WARNING – do not underestimate this hike
This hike is classified as very difficult and fully deserves its rating. I’m a fairly sedentary person who does weight training twice a week and can barely manage a 10km run; I’d say I’m in reasonably good shape, and yet… This was the most difficult hike I’ve ever done.

We set off at 9.30 am (a big mistake – I’d recommend setting off at 7.00 am ideally) as we were returning from a night at Lac de la Sassière, where it was 11°C with a bit of sunshine. You quickly feel the elevation gain; it just goes on and on. Tiring, but nothing insurmountable. There were a few sections with ladder rungs carved into the rock to help, but not over a drop. Some other sections required using your hands for extra security. For those with a fear of heights, the hike can be very frightening. During the hike, the weather turned cloudy and the temperature plummeted (below freezing at the summit).
My partner was very cold; luckily, we had the necessary kit in our rucksacks to cope with it.
Please note, the route isn’t very well signposted; on several occasions we took the wrong path for about thirty metres before realising our mistake, but thankfully Visorando helped us find our way back quickly. Then, halfway through the hike (checkpoint 2), the altitude and accumulated fatigue began to make the hike physically exhausting. When we reached checkpoint 3 (3,300 m), we thought we weren’t far from the end, but it turned out that, with the fatigue and, above all, the effects of the altitude – which shouldn’t be underestimated (shortness of breath, the cold, headaches) – the hike had become extremely difficult. All the more so as the final section of the hike is very steep. Over the final 200 metres of ascent, we couldn’t manage more than 10 steps without having to stop to catch our breath.
It wasn’t our physical strength that got us to the summit, but our mental resilience, as we really had no energy left at all. As we were in the clouds, we didn’t get to enjoy the views at all, either during the hike or at the summit. The ascent took 6 hours, including a lunch break, followed by the descent, which was very long and gruelling due to our accumulated fatigue. In the end, the whole hike took us 10 hours instead of the 7 hours originally estimated.

We’re proud to have reached the summit, but if we’d known in advance what lay ahead, we wouldn’t have done the hike as it was too difficult and dangerous at that altitude given our level of fitness.

In short, this review is simply intended to warn anyone planning to do this hike.
If you’re not used to high-altitude hiking and aren’t fit enough (able to run 10km easily), I strongly advise against attempting this climb.

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