How to Hike to Lac Blanc: The Greatest Hike in Chamonix

The hike to Lac Blanc is absolutely epic, and it easily ranks as one of my top favorite experiences in the French Alps around Chamonix.

This stunning alpine lake sits high in the mountains, perfectly positioned with the Mont Blanc Massif rising dramatically in the background. The scenery here is truly special, and if you can do the hike, it’s worth making the effort to experience it for yourself.

Ways to Get to Lac Blanc

A quick note about how the mountains around Chamonix are structured. The mountains on either side of the valley are quite steep, having been carved and scraped away by glaciers in the recent past.

About midway up, there’s a several-hundred-yard-wide bench where the terrain levels out before rising steeply again toward the peaks.

There are many gondolas along the valley that carry visitors up into the mountains. These typically run in two sections: first from the valley to the bench, and then onward via a second gondola or chairlift toward the upper ridge. Not all gondolas run in summer, but many do.

There are a few different ways to hike to Lac Blanc using these gondolas, and there are some significant differences between the options.

Option 1

The first option is to take the La Flégère gondola from the valley up to the mid-mountain station (Refuge de la Flégère) and then hike up to the lake from there.

While this is probably the most common approach (and often the one used by guided tours), I’d actually recommend against hiking up from Refuge de la Flégère, as it’s pretty steep the entire way.

Tip: The La Flégère gondola station is located 3km north of central Chamonix (location). You can reach it from the city center via:
✅30-minute walk
✅Drive and park in the La Flégère station lot (which quickly fills up)
✅Take the #1 or #2 bus to the Les Praz – la Flegere stop
✅Take the train from the Chamonix Mont-Blanc station to the Les Praz de Chamonix station.

Option 2

Instead, my preferred option is to take the La Flégère gondola, and at the mid-way station, transfer to the L’Index chairlift and ride it to the top. From there, you hike over to Lac Blanc.

This route is much, much easier overall. I’d estimate that about 2/3 of the hike from L’Index to Lac Blanc is either mostly flat or downhill.

I’d call it pretty easy, especially compared to the fairly intense uphill climb you’d face starting directly from La Flégère. There are some rocky spots you have to pick around, though.

This is the option we chose to do, and the trail was stunning, walking in the shadows of the mountains on a rocky trail.

Option 3

Another great way to reach Lac Blanc is by incorporating it into the Grand Balcon Sud hike. This high-elevation trail runs along the Aguilles Rouges mountains, which line the northwest side of the valley.

The trail follows the bench and offers continuous views down the valley and across the jagged, dramatic peaks that make this area so famous.

To do this route, take the Pran Plaz cable car from Chamonix up to the Plan Praz mid-station. This a completely separate gondola line, far from La Flégère.

From the Pran Plaz mid-station, you’ll hike the Grand Balcon Sud trail, eventually reaching the Refuge de la Flégère mid-station. From here, you can either take the l’Index chairlift up and hike over, or hike up to the lake directly (aka Options 1 & 2).

We originally were planning on doing this route to Lac Blanc. However, the day we were hiking the Grand Balcon Sud, there were decent clouds over Mont Blanc, and we decided to push Lac Blanc off until a clearer day. The Grand Balcon Sud is still a phenomenal hike though!

You could also do Lac Blanc first and then hike the Grand Balcon Sud starting from La Flégère, ending at Plan Praz.

Lac Blanc

When you arrive at the Lac Blanc area, you’ll see a small refuge hut selling food and drinks, along with a large sign announcing that you’ve reached Lac Blanc. But interestingly, there are actually two lakes right next to each other.

On many maps, the first lake you reach isn’t clearly named, while the lake tucked farther back is labeled Lac Blanc. It appears that the two lakes may technically be Lac Blanc Supérieur and Lac Blanc Inférieur, though the signage on the trail isn’t especially clear.

What’s important to know is that the first lake you reach (the smaller, unnamed lake on the map) is where the truly iconic views are. This is the spot where you can get behind the lake and enjoy those incredible views of Mont Blanc and its neighbors in the background. 

And what views they are! The mountains reflect off the glassy water. It’s just so breathtaking.

The actual, map-named Lac Blanc sits farther back in the mountains and is much harder to get behind. And while the views there are nice, they are nowhere near as dramatic.

In practice, the entire area is referred to as “Lac Blanc,” but remember that the lower lake is where the money views are. 

Once you’ve wandered around the lake to your heart’s content, I’d recommend climbing up the trail behind the lakes, at least a little bit. These views looking down over the lake are just as spectacular. Truly, this was such a pinch-me moment, I loved it so much.

Definitely pack a lunch or a snack and plan to sit for a while to take in the incredible scenery.

Finishing the Hike

However you choose to reach Lac Blanc, I’d recommend hiking down to La Flégère to get off the mountain. The trail from Lac Blanc down to the La Flégère cable car station is downhill and overall easier than climbing back uphill toward L’Index, especially later in the day. 

You’ll need to keep track of time; cable cars stop running down to the valley at 4pm, and the L’Index chairlift stops 15 minutes before that. If you miss the cable cars, you’ll have a very long hike all the way down the mountain.

If you hike from L’Index to Lac Blanc and then down to La Flégère, the total loop will be:

• Distance: 4.5 miles
• Elevation: 400 ft

Crowds & Timing

This is a very popular hike, and timing makes a big difference. We arrived at the La Flégère cable car station about 10 minutes before the gondola started running, which put us among the first wave of people heading up.

At that point, the trail and the lake were very quiet, with just a handful of other people around. But by the time we left, the lake shore was starting to get more crowded.

On our way back down, we passed a lot of people hiking up, and the difference on the trail was very noticeable. By the time we returned to the valley, the La Flégère parking lot was completely full, with cars circling and looking for spots.

If you can, I’d highly recommend starting early in the morning or going later in the day to avoid the worst of the crowds (make sure you keep the closing times in mind).

I would also recommend planning about 3 hours to do the hike, which accounts for hiking there and back, plus some time to relax at the lake.

Weather Considerations

Weather in Chamonix can be finicky, and clear conditions make all the difference for this hike. For the most stunning views, you want good visibility across the valley toward the Mont Blanc and its sister peaks on the opposite side.

If clouds are sitting low and thick on Mont Blanc, the lake itself will still be beautiful, but it won’t be anything close to what it can be on a clear day. The dramatic ridgelines and mountain backdrop are what really make this spot so special. I’d keep your schedule as flexible as possible and prioritize this hike on a day when conditions look clear.

We did this hike in the morning and then went over to the Aiguille du Midi in the afternoon (another spot where you want the clearest conditions possible).

One helpful resource is the Chamonix website weather forecast, which shows not only the forecast but also where clouds are expected to sit in the valley and how high or low they may be.

This detailed version only goes a couple of days out, with a more general outlook beyond that.

Cable Car Tickets

A round-trip ticket on the La Flégère/Index cable car costs €24, and you can buy in advance or on-site. Alternatively, this cable car is part of the Mont Blanc Unlimited Pass, which you can buy for multiple days.

If you’re doing several hikes, viewpoints, or experiences (such as Mer de Glace or the Aiguille du Midi) around the Chamonix area, the pass is almost certainly going to be your best value.

Final Thoughts

Lac Blanc was an unforgettable experience in Chamonix. The lake itself is beyond stunning, and the views as we hiked over made us want to stop every few steps and just soak it in.

Take advantage of the chair lifts, watch your timing and weather, and  I’m sure you’re going to love doing this hike as well.

Looking for More Hikes and Experiences in the Alps?

These are some of the other trails and viewpoints we loved in and near Chamonix:

• How to Visit the Aiguille du Midi: Get Close Up to Mont Blanc
• How to Visit Mer de Glace: The Glacier Ice Cave
• The Cirque du Fer-a-Cheval: A Stunning Hike in a Glacier Valley
• How to Hike to the Albert I Glacier Near Chamonix