the vineyards straddle both the true Mediterranean and the continental climatic regions where in this part of France the transition is rapid, winter snow being frequent in Montélimar but rare some 20 - 30 kilometres further south.

In this transitional area between the northern and southern Rhône wine regions that constitutes the northern limit of the Provence, the climate in Baume-le-Transit and St Paul are more typically Mediterranean climate than the slightly cooler areas dominated by the Lance mountain.

[1] A characteristic of the wines from this appellation is their great diversity due to the many and mixed soil types and varied climates.

The central part of the region comprises sandstone hills, while the southeast is covered with stones or gravel.

[1] The wines are produced in 21 communes of the Drôme département at the northern limit of the Provence: Allan, Baume de Transit, Chamaret, Chantemerle-lès-Grignan, Châteauneuf-du-Rhône, Clansayes, Comonzelle, Donzère, Garde-Adhémar, Granges-Gontardes, Grignan, Malataverne, Montségur-sur-Lauzon, Reauville, Roche-Saint-Secret-Béconne, Roussas, Saint-Paul-Trois-Châteaux, Saint Restitut, Salles-sous-Bois, Solérieux, Valaurie.