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Day in August when the 2020 grape harvest officially began in the Napa Valley. Sparkling wine producers are typically the first to pick since high acidity and low sugar levels in the grapes are desirable for making sparkling wine. Mumm Napa and Schramsberg were the first two wineries to begin picking. In years past, this day was marked by large boisterous festivities. This year, celebrations were more muted.