







Starting from Le Grand-Bornand Chinaillon, a 2.5 hour loop during which 11 interpretive signs explain the different facets of the mountain environment: flora, fauna, habitat, geology, ...
Starting altitude: 1,300 m. Highest point: 1,931 m
Return via the same route. Beware of storms on the ridge.
Alternative route possible to complete a loop with a return via the chalets of Mayse, Le Planay and the old village (elevation gain 1,100 m and 6½ hours).
Lake Lessy is part of the Natura 2000 programme, which aims to protect remarkable environments.
In terms of plant life, the lake is home to a very large population of alpine pondweed and a smaller population of thorny buttercup. In terms of amphibians, the lake has a colony of Alpine newts.
In this context, swimming is strictly prohibited.
The following are also strictly prohibited:
- Camping. It is only permitted under the stars (i.e. without tents, tarps or other types of shelter) near the communal refuge at Lake Lessy, with the permission of the caretaker.
- Campfires and outdoor fires, the use of stoves and barbecues.
- Drones.
- Slacklines.
Fishing is permitted: 1 catch per day per fisherman, single barbless hook, natural bait or fly only. River permits are available for purchase at the Grand-Bornand Tourist Office.
Lakeside or by stretch of water
Near shuttle stop
Lake view
Mountain view
Mountain location
Close to a public transportation
Village 2 km away
Waterside
Le Grand-Bornand Tourisme - 26/07/2025
www.legrandbornand.com
Report a problem
From 01/05 to 30/11 daily.
From spring to autumn, depending on snow and weather conditions. Inquire about conditions before heading out. You are responsible for your own safety.
Subject to favorable weather.
Phone : 04 50 02 78 00
Email : infos@legrandbornand.com
Website :
https://www.legrandbornand.com
https://www.cirkwi.com/fr/circuit/185344-le-lac-de-lessy-et-l-aiguille-verte
Facebook : http://www.facebook.com/legrandbornand
Twitter : http://twitter.com/mongrandbo
The trail starts in front of the Tourism Office in Le Grand Bornand Chinaillon.
Yes