Milbrandt Vineyards - We are celebrating over 10 years at our Prosser location! Visit us to learn about the history of Milbrandt and why our wines are a favorite among Washington wine aficionados. Ryan Patrick Wines - From its humble beginnings as a family winery to today's incarnation as a Columbia Valley AVA star with a new tasting room location in Prosser Ryan Patrick continues to create approachable wines with a serious edge.