About Diamond Mountain Vineyard
The property was first planted in 1895 by Danish immigrant Andras (Andrew) Rasmussen, who cleared roughly 30 acres of vines on the site. Fred and Mary Constant acquired the estate in 1993 and built the modern winery, releasing their first vintage as CONSTANT in 1995 and commissioning architect Howard Backen to design 'The Peak' residence beside a stone-quarried barrel cave.
Following Fred Constant's death in 2014, Mary sold the property; it is now owned by Sai You and Aries Liu, who rebranded it Diamond Mountain Vineyard. The nearly 40-acre estate climbs to about 2,100 feet on volcanic, porous soil, with the 22-acre Diamond Peak Vineyard as its largest block; the estate produces roughly 1,200 cases a year and sells about 60% of its fruit to other Napa producers.
First planted in 1895, the estate climbs to roughly 2,100 feet on Diamond Mountain and sells about 60% of its fruit to other Napa producers.
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Planted 1895Danish immigrant Andras Rasmussen cleared and planted the original vineyard, giving the label its 'Est. 1895' mark.
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Formerly Constant Diamond Mountain VineyardFred and Mary Constant developed the modern winery from 1993; current owners Sai You and Aries Liu rebranded it Diamond Mountain Vineyard after Fred's 2014 death.
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~2,100-foot elevationNearly 40 estate acres on volcanic, porous soil, including the 22-acre Diamond Peak Vineyard block.
"A historic (1895) Diamond Mountain estate, formerly Constant Diamond Mountain Vineyard, now independently owned and operating as Diamond Mountain Vineyard, distinct from neighboring Diamond Creek Vineyards."
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Featured Wines
CLARET
Diamond Mountain Vineyard Claret
Current release · Diamond Mountain District, Napa Valley
Bordeaux-style estate blend continuing a bottling first produced under the property's previous name, Constant Diamond Mountain Vineyard.
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CABERNET SAUVIGNON
Diamond Peak Vineyard Cabernet Sauvignon
Current release · Diamond Mountain District, Napa Valley
Estate Cabernet Sauvignon from the property's largest block, the 22-acre Diamond Peak Vineyard.
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SYRAH
Diamond Mountain Vineyard Syrah
Current release · Sonoma County/Napa Valley
Estate Syrah grown on the property's Sonoma County-side block, a less common varietal on Diamond Mountain.
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Varietal lineup (Chardonnay, Merlot, Claret, Cabernet Sauvignon, Cabernet Franc, Syrah) and the named Claret bottling are confirmed via diamondmountainvineyard.com and third-party retail listings; exact current vintages and prices were not independently confirmed due to a research-tool outage in July 2026 — verify against the winery's shop before publishing.
Tasting Experiences
Visit Website →Estate Visit
A private, reservation-only visit high on Diamond Mountain overlooking Napa Valley; priority given to Diamond Collectors club members.
By appointment (~72-hour confirmation)
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