Owned by Alain Brumont, who is also at the head of Château Montus, Bouscassé is one of the big names of Madiran. In 1979, Alain Brumont left the family-owned domaine of Château Bouscassé and bought Château Montus. He completely changed the vineyards (with other rootstocks and seedlings selected…) and took inspiration from the Bordeaux model, aging his wines in small new oak barrels. In 1982, he made his first wines with the grapes from three-year-old vines. This great success marked the beginning of Madiran wine's worldwide renown. Some years later, he went back to running the family domaine, Château Bouscassé. The wines from both domains are vinified at Château Montus. Brumont is therefore the largest landowner in the appellation (with almost 180 hectares) and owns the best parcels.

The cuvée Brumaire is matured on its lees in barrels for eight to twelve months, with stirring with lees. The nose has wonderful aromas of candied fruit, while in the mouth it is fresh, fruity, sweet and concentrated. This cuvée works well both as an aperitif wine and at the end of a meal, alongside foie gras or fruit desserts. To produce this surprising, complex wine, berries were pressed in entire bunches, juices were selected after pressing and fermented in new barrels.