CONSTANT Diamond Mountain Vineyard® may just be the highest (2121’), oldest (1895) vineyard, and smallest winery in the Napa Valley. Our location here at the top of the Diamond Mountain District appellation is, perhaps, one of the best places in the world to grow Bordeaux varietals and is unequivocally, the most beautiful and romantic.

CONSTANT produces a limited supply of Cabernet Sauvignon, Cabernet Franc, Claret and Syrah from its mountain estate exclusively for mailing list members.




“A new can’t miss cabernet… It reminds me of the first time I tasted Dalla Valle, Bryant Family, Harlan Estate or Screaming Eagle…this vineyard is able to produce stunning wines on a consistent basis.”   
~ J. Laube, The Wine Spectator, Jan 1999

"With the assistance from winemaking consultant Paul Hobbs, the Constant's have gone from strength to strength… Fred and Mary Constant's vineyard which straddles the Napa/Sonoma county line high on Diamond Mountain is one of the most beautiful sites in an area known for spectacular vistas."
~ R. Parker, The Wine Advocate, Dec 2010