While the first part, which is shared with the ascent to La Féclaz, takes you out of Chambéry, it's from St Jean d'Arvey that you begin to discover the mountain atmosphere of the Bauges massif. Beware: this ascent, though modest in terms of numbers, is not to be taken lightly, with a thalweg to cross the bridge over the Leysse and reach Thoiry, then a substantial final stretch with passages at 10%.
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