Fancy a refreshing swim in an exceptional setting, facing Mont-Blanc? Welcome to the biotope lake of Combloux, the first ecological body of water open to swimming in France.

With its water naturally filtered and warmed by the rays of the sun, it will offer you an unforgettable experience in the mountains!

The biotope of Combloux, a natural swimming pool facing Mont-Blanc

The Combloux natural swimming pool is located close to the village center, in a landscape with a 360° view of the mountain ranges.

Take advantage of the 1750m² pool, whose water quality is ensured by more than 10 aquatic plants. Due to natural water treatment, the number of people per day is limited. Reservations are strongly recommended in high season.

What you will love at the Combloux biotope lake

At the Combloux biotope, everything has been thought out so that you can make the most of your swimming day!

  • Picnic on your towel facing Mont Blanc
  • Freedom to go in and out throughout the day (a wristband will be given to you at checkout)
  • A pure bathing water and without chemical treatment
  • 4 swimming lanes sport of 50 m each (summer 2023)
  • A paddling pool for children (summer 2023)
  • Online Booking to make sure you have a place
  • A brushed concrete solarium with seat
  • A grassy beach

New in 2022!

Since September 2021, major work has begun as part of the rehabilitation and expansion of this tourist facility.

The new biotope body of water will be equipped with a completely redesigned mode of operation and filtration system, to remain at the forefront of ecological swimming!

The services offered at the biotope lake

To improve the comfort of your visit, several additional services are offered:

  • Swimming lessons: information and registration at the reception of the biotope lake and with the lifeguards
  • Rental of parasols and deckchairs on site (subject to availability)
  • 80 umbrella sleeves installed on the beach
  • WC and changing rooms with changing table
  • Possibility of reheating baby food
  • Distributor of swimsuits
  • Group reception by reservation
  • PMR accessibility in the pool and adapted devices within the enclosure of the body of water: WC, grab bar and circulation space. Seahorse available.

Prices for Lake Combloux

General public pricesSummer 2022
Adult :6 €
Child * :4,50 €
12-entry family card:57 €
(valid only for the current summer season)
Adult season pass:60 €
Child season card:45 €
For children under 5:Free
* The child rate applies from 5 to 14 years old.

From 16 p.m. (if the body of water is not full): entry at €3.60 for adults and €2,70 for children.

Other ratesSummer 2022
Deckchair or parasol rental *:€5 each
Parasol + deckchair rental pack *7 €
Swimming lessons **25 € for 30 minutes
*For any rental of equipment, a deposit of 20 € will be required. In the limit of the available stock. **Access to the biotope lake after the lesson not included.

Free for group leaders (holiday centres, leisure centres, daycare centres, schools):

  • 1 adult for 5 children under 6 years old
  • 1 adult for 8 children from 6 to 16 years old
  • 1 guide for 2 people with disabilities

To buy your place for the day:

  • Online until 10 a.m. the same day
  • At the Tourist Office until 10 a.m.
  • Directly at the cash desk of the biotope water body from 11 a.m.

Opening hours and access

Ideally located between Megève and Sallanches and just a few minutes from Saint-Gervais-les-Bains, swimming in the Combloux biotope is an essential activity during your summer stay in Haute-Savoie.

The body of water modifies its opening ranges:

During the summer holidays (until August 31):

  • Every day: 11 a.m. to 19 p.m.
  • Tuesday until 20:30 p.m.

After the summer holidays (from 1 September):

  • Monday, Tuesday, Thursday, Friday: 16 p.m. to 19 p.m.
  • Wednesday and weekend: 11 a.m. to 19 p.m.

Access to the biotope

  • Dogs are not allowed within the enclosure of the body of water.
  • Only swimming trunks and boxers are allowed. Swimming trunks and shorts are prohibited.
  • Tickets purchased in advance cannot be refunded or exchanged.
  • Tickets do not need to be printed.
  • Evacuation of the pool 15 minutes before closing.

Focus on the biodiversity of the natural swimming pool of Combloux

More than 10 plants are active every day in their ecosystem to filter the water of the ecological lake of Combloux!

The emblematic reeds (phragmites australis) with their purifying virtues and the water lilies (nymphéas alba) with their aesthetic virtues, are the great animators of the floral spectacle that the body of water offers every day.

Other types of plants complete this active cleaning work:

  • The delicate Pimpernel (Anagalis tenella), an oxygenating plant that keeps the water in the pool crystal clear
  • Swamp Trefoil
  • The sharp-tepaled rush
  • The Scattered Rush which serves as a refuge for newts and frogs
  • Buenos Aires Verbena
  • And many other species

In terms of fauna, the biotope is home to various animal species. Among the main ones:

  • The Alpine newt, amphibian animal that lives both on land and in water to reproduce and lay eggs that will give aquatic larvae
  • The dragonfly, a very important flying insect in the ecosystem of the body of water because it protects aquatic spaces from predators such as mosquitoes that it catches in mid-flight
  • The little green frog (Lessona's frog), with its bewitching song, which brings an incomparable charm and atmosphere to the lake throughout the season

Bon plan!

2 places are included in the Summer Destination Mont-Blanc Pass.
This pass is valid for 7 days and allows you to enjoy a multitude of activities and advantages in the Pays du Mont-Blanc.

Dine nearby

Overlooking the biotope, the restaurant the Dandy is ideally located for a gourmet break between two swims or simply to refresh yourself during the day or enjoy the sunset.


The Dandy

1 Prairie Road
74920 Combloux
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Frequently asked questions about the biotope lake of Combloux

What clothing is required for swimming?

Only swimming trunks and boxers are allowed.

Swimming trunks and shorts are not allowed.

Can I get a refund for my ticket purchased online?

Tickets purchased in advance are neither exchangeable nor refundable.

Can I come to the biotope lake with a person with a disability?

Yes, the biotope lake of Combloux is suitable for welcoming people with disabilities. Our site is equipped with a launching wheelchair to facilitate access to swimming.

Where can I buy my ticket?

Online until 10 a.m. the same day.

At the Tourist Office until 10am.

At the cash desk of the biotope water body from 11 a.m.

What are the opening dates for the upcoming season?

Due to the renovation and expansion of the water body that are taking place at the moment, the opening dates for summer 2022 are not yet defined.

What are the opening hours of the Combloux biotope lake?

Before the summer holidays (until July 5):

  • Monday, Tuesday, Thursday, Friday: 16 p.m. to 20 p.m.
  • Wednesday and weekend: 11 a.m. to 19 p.m.

Before the summer holidays (until July 5):

  • Every day: 11 a.m. to 19 p.m.
  • Tuesday until 20:30 p.m.

After the summer holidays (from 1 September):

  • Monday, Tuesday, Thursday, Friday: 16 p.m. to 19 p.m.
  • Wednesday and weekend: 11 a.m. to 19 p.m.

What is the temperature of the water?

The water temperature varies between 19°C and 26°C. Find the water temperature in real time on our LIVE section.

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