The Col des Mosses region is made up of two villages, Les Mosses (1445m) and La Lécherette (1380m), between the Chablais and Pays-d'Enhaut regions. These two villages occupy the two sides of the valley, the western side for Les Mosses, up to 1870 metres, and the eastern side for La Lécherette, up to 1680 metres.

They form part of a vast marshland area of national ecological importance, home to rare species and a remarkable variety of biotopes. These marshes have been protected since the Rothenthrum initiative of 1987. Six high marshes and hundreds of hectares of low marshes make up the marshy area of the Col des Mosses.

The high marshes are carpeted with sphagnum mosses, the mosses that form the famous peat, which can reach up to 12 metres in height in these marshes. The colour green is omnipresent, with only the sedges adding a touch of brown. These plants gave their name to La Lécherette. The name Mosses comes from the German word Moos, meaning marsh. The white plumes of the cottongrass add a different touch.

The moraines surrounding the marshes give way to a marshy meadow with a richer flora. In addition to their highly specific biodiversity, the marshes are also reservoirs of water that could outlive the glaciers in these times of climate change. Pastures and meadows rub shoulders with marshes to provide habitats for a wide variety of animal species, including birds, butterflies, dragonflies, batrachians and reptiles. The presence of wetlands and the gentle relief are explained by the impermeable flysch and morainic deposits.

The Col des Mosses is accessible by public transport with the Postbus, getting off at the Poste stop.