Grgich Hills Estate is an iconic Napa Valley winery, consistently producing world-class wines that welcomes walk-in visitors to our main tasting room. Committed to natural wine growing and sustainability, our vineyards are certified organic and we use our passion and art to handcraft food-friendly, balanced and elegant wines. Daily 930am-430pm. Group tours. Minimum number in a group two by appointment. AE, MC, V.