Vieux Bois by Bozeman Brewing Co. is being evaluated as a 23F-Fruit Lambic. In this instance, it is made with plums, though the variety of which is not declared. This is a style that is based in history through use of specific Belgian processes to achieve a complex, wine-like beverage. This one pours a somewhat turbid pale straw with a collapsed head, even with assured careful decanting. The nose is sharp and faintly acetic with a latex edge. The fruit is subtle and floral with a bit of vanilla as well. On tasting, I do get more of the same. Sharp and mildly acetic/vinegary, which is out of character and feels more American than Lambic-inspired. The acid is sharp and hot through the finish. The expression of the of the plums adds some roundness and sweetness, but this beer seems lacking the finesse and complexity of a true lambic. Even with the acidity, it does find drinkability, though this isn't easy to drink a lot of, unfortunately. A bit less oxygen and careful controls will help mitigate the acetic character that should be absent in a lambic.