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Diamond Mountain District AVA
Diamond Mountain District AVA
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Diamond Mountain District AVA
Diamond Mountain District AVA
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Diamond Mountain District AVA
Diamond Mountain District AVA

Images Courtesy of Suzanne Becker Bronk

The Diamond Mountain District AVA is a Napa Valley Appellation located in the northwestern corner of Napa County. The name Diamond Mountain District was inspired by the reflective shards of volcanic glass material found throughout the soil.

Appellation Details

The Diamond Mountain AVA is a sub appellation of the Napa Valley AVA located in northwestern Napa County. The Diamond Mountain District rises up into the east side of the Mayacamas mountains, southeast of Calistoga and is named after the prodigious amounts of obsidian and volcanic glass present in the volcanic soils.

The Diamond Mountain District AVA benefits from its relatively higher elevation by facing less extreme heat than the valley floor and typically remains frost-free during the winter months. Though the Diamond Mountain District lives in the warmer northern end of Napa Valley, the Diamond Creek river drainage allows a channel of cool air to penetrate the hillside, prolonging the growing season and mitigating late season heat spikes. Furthermore, as the majority of vineyards are east-facing, they are protected from the hot afternoon sun. These factors, along with the elevation and meager soils, combine to make for powerful ripe wines that are rich in sturdy tannins and bright acidity.

Cabernet Sauvignon is the dominant grape. The soils are primarily volcanic in origin though aren’t as red in hue as found regularly across the valley. As with Mount Veeder, much of the terrain of Diamond Mountain is too severe to be cultivated, so the majority of the mountain remains covered in thick redwoods.


  • 400 to 2,200 feet (122 to 671m)
  • The Diamond Mountain District is located at a higher elevation than many Napa Valley Appellations, which results in less cool fog forming from the influence of the San Pablo Bay. The elevation also results in more exposure to sunlight, without the heat of the lower valley.


  • Residual uplifted soils of volcanic origin
  • Reddish and very fine-grained, even gritty in texture
  • Composed of both weathered sedimentary and volcanic origin soil
  • The volcanic origin soil is very porous, allowing it to cool quickly despite the increased sunlight


  • Moderately warm temperatures with lower highs (90°F or 32°C) and higher lows (50°F or 10°C)
  • Temperatures 10° to 15°F cooler than valley floor in summer
  • Mostly located above the fog line
  • Low diurnal change compared to other Napa Valley AVAs
  • Summer temperatures rarely above 90°F (32.2°C)


  • Up to 55 inches (140 cm) annually

Principal Varieties:

  • Cabernet Sauvignon
  • Cabernet Franc

Diamond Mountain District AVA History

Jacob Schram

Jacob Schram

The history of Diamond Mountain District as a wine growing area begins in 1862, when Jacob Schram purchased property on the east side of Diamond Mountain for the purposes of planting grape vines. He had previously worked as a barber in White Sulpher Springs and Napa City before moving to Diamond Mountain for his health. Schram and his wife went into the fields themselves and planted a small section of grapevines. From this humble beginning, "Schramsberger" wine went on to become one of the most recognizable brands in the world. To this day Schramsberg winery still bears his name.

Similar to other appellations in Napa Valley, wine production in Diamond Mountain District diminished during the outbreak of Phylloxera in the 1890's and then Prohibition in the 1920's. However, in the mid-1960's wine production returned to Diamond Mountain when the old Schramsberg property was purchased by Jack and Jamie Davies. Other winemakers returned as well in through the 1960's and 1970's, with Al Brounstein, Rudy Von Strasser and Andre Tchelistcheff developing vineyards in the area.


"Diamond Mountain District wines feature great tannin structure and rather than big red fruit like raspberry or blackberry, there are lovely blue fruit characters, plum, currant, cherry, fruit flavors with wonderful structure and minerality."
- Dawnine Dyer, Dyer Wine

Notable Wines sourced from Diamond Mountain District AVA

Dyer Vineyard
Dyer Vineyard 2017 Cabernet Franc

Dyer Vineyard is a 2.3 acre vineyard in Napa Valleys Diamond Mountain District. It is planted to Cabernet Sauvignon, Cabernet Franc, and Petit Verdot. In some years we make a small amount of 100% Cabernet Franc.

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Davies Vineyards
Davies Vineyards 2008 'jd' Cabernet Sauvignon

A stunning Diamond Mountain District Cabernet Sauvignon from the oldest hillside vineyard in Napa, the Schramsberg Vineyard property. A creation of the next generation of the Davies family, the jd is the product of an intimate knowledge of a place and a passion to create a delicious red wine.

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HALL 2011 'HALL 'Diamond Mountain'' Cabernet Sauvignon

HALL ' Diamond Mountain District' Cabernet Sauvignon

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Vineyard {511}
Vineyard {511} 2013 'Vineyard {511}' Cabernet Sauvignon

This 2013 Cabernet Sauvignon comes from a unique one-acre vineyard on a west-facing hillside in the Diamond Mountain District of Napa Valley. Planted in rocky, white-ash soil, this unique site provides low-yielding, small berries, that reveal a rich and concentrated wine with flavors of blackberries and cassis.

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Diamond Mountain District AVA Resources and References

  1. "§9.166 Diamond Mountain District" (Title 27: Alcohol, Tobacco and Firearms; Part 9 — American Viticultural Areas; Subpart C — Approved American Viticultural Areas). Code of Federal Regulations. Retrieved October 31, 2007.
  2. "Diamond Mountain District Viticultural Area (99R-223P)". Federal Register. Office of the Federal Register, National Archives and Records Administration. 66 FR (106): 29695–29698. June 1, 2001. Retrieved June 28, 2011.
  3. The History of Diamond Mountain Wine Production. Diamond Mountain Wine History. (n.d.). Retrieved September 29, 2022, from https://www.calwineries.com/explore/regions/napa-valley/diamond-mountain/history
  4. Pitcher, Steve. "Mining Jewels on Diamond Mountain". The Wine News. No. June/July 2005. Archived from the original on September 30, 2011. Retrieved June 27, 2011.
  5. Miller, Fran "Diminutive Yet Dynamic". Napa Valley Life Magazine, April 8, 2021. Retrieved Sep 8, 2022.
  6. Palmer, Lyman L.; Wells, Harry Laurenz (1881). History of Napa and Lake Counties, California. Slocum, Bowen & Company. ISBN 978-1363000555.
  7. Weber, Lin (1998). Old Napa Valley: The History to 1900. Wine Ventures Publishing. ISBN 9780966701401.

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