Starting out from Yvonand, this walk takes hikers towards new discoveries of nature, culture, fields and woods. Vallon des Vaux used to be inhabited mainly by oaks, the tree venerated by the Celts. Today, they consist mainly of beech trees and conifers.
This nature reserve, a true canyon at its purest, enchants visitors with its wild beauty enjoyable at the bottom of the gorge as well as from the top of the sheer cliffs created by the Vaux and Flonzel brooks. Chamoises, the masters of this site, can be glimpsed here sometimes.
Hikers have the possibility to discover the many cultural features, such as Tour St-Martin, the only remainder of the St-Martin-du-Chêne seigniory, one of the most important ones in the Middle Ages, or the elliptical church in Chêne-Pâquier, which was built in 1667, one of the oldest witnesses of Protestant architecture in Switzerland.