Part of Almanac's celebrated Sournova series, this barrel-aged sour ale is the real deal—not a quick kettle sour but a patient, oak-aged mixed-culture fermentation loaded with thousands of pounds of real plums and vanilla beans. Founded in 2010 in Alameda, Almanac built its reputation on exactly this kind of beer: seasonal fruit, live cultures, and time in wood. Each batch is a vintage expression of its ingredients, with the tart complexity that only traditional barrel aging can deliver.