The road passes the source of the Aveyron and into the Parc Natural Régional des Grandes Causses. After crossing the Col d'Engayresque (888m) the N9 re-appears and drops into the Gorges du Tarn and onto Millau where the road crosses the river and climbs up to the Causse du Larzac offering views of the valley and viaduct.
The road moves past the Aveyron's source and enters the Parc Natural Régional des Grandes Causses. After crossing the Col d'Engayresque (888m), the N9 reappears and descends into the Gorges du Tarn and onto Millau, where it crosses the river and climbs to the Causse du Larzac, offering views of the valley and viaduct.