L'Aventure was founded in 1998 by a French winemaker, Stephan Asseo. After Stephan graduated enology school in Burgundy, the Asseo family bought their first estate, Domaine de Courteillac, in the Bordeaux area in 1982. Later, the family purchased additional properties: Château Robin and Château Fleur-Cardinale in Saint-Emilion. Stephan raised these properties to a level of great quality, while managing some other well-established domaines such as Château Guillot-Clauzel in Pomerol and Château Corbin in St Emilion.
Stephan saw in the New World a unique opportunity to expand his experience, while gaining more freedom in viticulture and vinification. He began by looking all over California for land, including Napa/Sonoma and Santa Barbara counties, but it was the terroir and climate of Paso Robles that impressed him the most.