Ecological Lake

The first ecological swimming lake in France, in a breathtaking panorama, facing Mont Blanc... Enjoy water free of any chemicals to refresh yourself during your mountain holidays in Haute-Savoie!

➡️ The experience in a nutshell
In Combloux, you can swim in natural water, filtered solely by aquatic plants. Le Biotope is France’s first eco-friendly swimming spot, set against the backdrop of Mont Blanc. The pool is bordered by a granite sunbathing area and a grassy beach.

➡️ Highlights of the Biotope
Water free from chemical treatment, filtered by over 10,000 plants
Direct view of Mont Blanc
Swimming pool with 4 x 50m lanes
2,900 m³ of swimming area
Family-friendly area with gentle access and a sandpit for little ones

➡️ To purchase your ticket for the Biotope:

During school holidays:

• Via our online shop www.combloux.com/boutique until 10.30 am on the day (no telephone bookings)
• At the Tourist Office from 9.00 am to 10.30 am
• Directly at the ticket office by the lake from 10.30 am, subject to availability.

Outside school holidays:

• Only available on site at the Biotope lake.

Tickets purchased in advance are non-refundable and non-exchangeable.
During school holidays, bookings are strongly recommended.

➡️ What to expect
People come here to swim, cool off, relax on the grass or granite, have a picnic, enjoy the view and take their time. The water temperature varies depending on the weather, generally between 18 and 26°C, which gives the place a lively atmosphere that changes with the days and seasons.

➡️ The little extra
Entry is free

Translated with DeepL.com (free version)

From 13/06 to 03/07/2026
Adult: 6.50 €
Child : 5.50 €.

From 04/07 to 30/08/2026
Adult: 7.50 €
Child : 6 €.

From 31/08 to 06/09/2026
Adult: 6.50 €
Child : 5.50 €.

Free entry for children under 5.
Child entry valid for 5 - 14 years.

From 4:00pm (if the water is not complete): entrance for 4.50 € for adults and 3.50 € for children

• Accompanying groups (Holiday center, recreation, daycare, schools):

• 1 adult for 5 children under 6 years old: free
• 1 adult for 8 children from 6 to 16 years old: free
• 1 companion for 2 disabled people: free

Season tickets and family passes (available for purchase only at the ticket office at the lake, subject to availability):

• Adult season ticket: €65
• Child season ticket: €55
• Family pass (12 entries): €60.

Pet allowed

Pet not allowed