Holy Grail Winery & Vineyard Printer Friendly Location Location: 17814 State Hwy N Marthasville, MO 63357 Contactholygrailwinery.comholygrailwinery@hotmail.com636-900-1191Amenities Food/Snacks AvailableOutdoor SeatingIndoor SeatingMVP WineryQuality, reserved wines aged in Missouri oak barrels. Surrounded by beautiful rolling hills and vineyards in Marthasville.