West of Riva Valdobbia town, opens the Val Vogna, a side valley just in part served by paved road, on the old so-called Antica via d'Aosta "ancient Aosta Track", that united Riva Valdobbia with Gressoney-Saint-Jean through the colle di Valdobbia, the Valdobbia Pass.
De Saussure supposed the name val-dobbia came from the French doubler, overpass.