Le 24 octobre 2015
Balade à la journée sur la barre des Dourbes, une falaise des Préalpes Dignoises qui étire au-dessus d’un socle de marnes son échine de calcaire sur 20 kilomètres. Au départ du hameau des Dourbes, les lacets du sentier bordant le ravin de Chabarouet et son empilement de strates grises et noires mènent à la crête sommitale de la barre des Dourbes, et son panorama à 360° sur les Préalpes du sud. Entre les pas de Tartonne et de la Faye on peut ensuite découvrir une arche naturelle d’une dizaine de mètres de diamètre, le trou de Saint-Martin appelé ainsi car le soleil levant le traverse le 11 novembre (et donc en hiver durant la journée symétrique par rapport au solstice d’hiver…). La descente par le pas de la Faye sur un tapis de feuilles mortes permet de profiter une dernière fois de l’hêtraie des Dourbes en plein flamboiement, avec un point de vue en contre-plongée sur le trou traversée quelques dizaines de minutes plus tôt.
robines vers le Rouvière, sur la route du hameau des Dourbes
au départ, dans la forêt en pleine mue colorée
lignes et couleurs dans le ravin du Chabarouet
du pas de Tartonne, vue vers les robines au-dessus des Sauzeries-Basses
sur le crête, au nord du pas de Tortonne
le Trou Saint-Martin, vue dans l'arche et depuis les Eychards
depuis le col de la Faye, vues vers la hêtraie du Défens des Dourbes et le glissement de terrain de Villard-les-Dourbes
retour sur et sous les feuilles
vue vers le ravin de Chabarouet
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