Brasserie du Mascaret ★ 4.2
Brasserie du Mascaret in Rions, 40 km up the Garonne from Bordeaux, is the organic-only Aquitaine brewery named after the tidal bore on the river.
Tip: The brewery itself is a 40-minute drive; the beers are easier to find at Bordeaux's organic supermarkets and Halles de Bacalan.