J. Lohr Vineyards & Wines is indeed a well-known winery based in California, USA. They produce a variety of wines, including the Estates Riverstone Chardonnay from the Arroyo Seco AVA (American Viticultural Area).

The J. Lohr Estates Riverstone Chardonnay Arroyo Secco 2018 is a specific wine produced by J. Lohr, and the vintage refers to the year the grapes were harvested and the wine was made.