Prager Winery & Port Works is a St. Helena producer dedicated to Ports and Late Harvest Riesling. Prager was founded in 1979 by Jim and Imogene Prager. Today the estate continues to be run by Jim and Imogene, as well as various brothers, brothers-in-law and adult children. Prager owns 15 acres of vineyards and produces about 4,000 cases a year. Prager makes a range of vintage and non vintage ruby, tawny and white Ports. It also makes a late harvest Riesling and Petite Sirah.