Alert
Alerts
Lessy lake by Cenise
3 alerts on this circuit
Visitor alert
Swimming, campfires and open-air fires during the day and at night, and the use of stoves and barbecues are prohibited.
Camping is prohibited on the site. Only tented bivouacs in a designated area are permitted, and only when the Refuge de Lessy is open.
FISHING LAKE OF LESSY:
Visitor alert
Swimming, campfires and open-air fires during the day and at night, and the use of stoves and barbecues are prohibited.
Camping is prohibited on the site. Only tented bivouacs in a designated area are permitted, and only when the Refuge de Lessy is open.
LESSY LAKE:
Visitor alert
Swimming, campfires and open-air fires during the day and at night, and the use of stoves and barbecues are prohibited.
Camping is prohibited on the site. Only tented bivouacs in a designated area are permitted, and only when the Refuge de Lessy is open.
IGN cards
Description
This hike takes you around the foot of the Jalouvre, Le Petit-Bornand's highest peak (2408 m) and via the Col de Sosay from where you will be able to see the Lac de Lessy, the Jalouvre, the Pointe Blanche and the Plateau de Cenise.
Views: Pointe de Sosay, Aiguilles Vertes, Col de Sosay, peak of Le Jallouvre, Plateau de Cenise, Aiguille Verte, Rochers de Leschaux
Herding dogs are present on this trail (Col de Sosay from the beginning of June to the middle of July and around the lake from the beginning of July to the end of September). Their approach must be done with great caution and certain instructions must be respected.
Technical Information
Altimetric profile
Starting point
Points of interest
Date and time
- From 15/06/2026 to 15/10/2026
Additional information
Open period
From 15/06 to 15/10 daily.
Subject to favorable weather.
Tips
Two other routes exist to go to the lake of Lessy : by Paradis or by Mayse
Updated by
Office de Tourisme Faucigny Glières - 27/08/2025
www.tourisme-faucigny-glieres.fr
Report a problem
Environments
Lakeside or by stretch of water
Waterside
Lake view
Mountain location
Presence of livestock and guard dogs
Contact
Phone : 04 50 97 38 37
Email : info@tourisme-faucigny-glieres.fr
Website : https://www.tourisme-faucigny-glieres.fr
Facebook : https://www.facebook.com/Faucigny-Gli%C3%A8res-Tourisme-871706486283390/?fref=ts
Type of land
Rock
Stone
Ground
Topo guides and map references
Map references :
IGN :3430 ET
Reception complements
Swimming in the lake of Lessy is strictly forbidden! A high altitude lake has a very fragile ecosystem that must not be disturbed.
Tricky passages
At the Col de Sosay, the terrain is often slippery and dangerous.
Guidebook with maps/step-by-step
1/ From the parking lot, take the path towards Cenise. 2/ At the Chalets de Cenise, take the direction of the Lac de Lessy (right). 3/ Go up in the direction of the mountain pasture until under the ridge of Chevry 4/ Cross the mountain pasture in the direction of Jallouvre. You will see the chalets of Britalay. 5/ The path goes to the left and passes under the rocks. 6/ Go up on the flat, pass next to a pond, then take the path which goes along the side of the mountain through a scree and reaches the pass of Sosay (be careful, slippery and dangerous passage in wet weather, be careful). 7/ The arrival at the pass reveals the Lessy lake nestled at the foot of the Aiguille Verte. 8/ Follow the downhill path that leads quietly to the Lessy chalets overlooking the lake. 9/ The return will be on the same path as the first one.
Animals
Yes. Domestic dogs are not recommended
Please note that dogs must be kept on a leash because of the presence of herds and for the protection of the fauna and flora of our mountains.
Data author
