Bias Vineyards & Winery is a family-owned winery started in 1980 by Jim and Norma Bias. The winery is located in Berger, Missouri, just seven miles east of Hermann.

Located on a 64-acre farm high atop the scenic bluffs overlooking the Missouri River Valley, their wines are produced from their own vineyards just 600 feet from the winery itself. This allows them to harvest and promptly crush the grapes the moment they reach their peak of ripeness. The pressing, fermentation, aging and bottling, like most Missouri wineries, are all performed at the estate as well.

Starting with just five acres of Catawaba grapes, they have expanded with four other varieties of French hybrids in Chambourcin, DeChaunac, Seyval and Vidal. They also operate a microbrewery on the grounds named Gruhlke's Microbrewery.