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Raymond Duncan (entrepreneur)

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Adapted from the English Wikipedia article Raymond Duncan (entrepreneur), available under CC BY-SA 4.0Updated 11 August 20252 sources
Raymond Twomey Duncan
Born (1930-10-23) 23 October 1930 (age 96)
Illinois, United States
Died9 October 2015(2015-10-09) (aged 84)
Denver, Colorado, United States
Occupation(s)Businessman, winemaker
Known forFounder of Duncan Oil, Silver Oak Cellars, Durango Mountain "Purgatory" Ski Resort; chairman of Colorado Ski Country USA

Raymond Twomey Duncan (October 23, 1930 – October 9, 2015), commonly referred to as Ray Duncan, was a notable American businessman and winemaker. He established Duncan Oil in Colorado and, together with Justin Meyer, launched Silver Oak Cellars in 1972, a distinguished winery with operations in both the Napa Valley and Alexander Valley. His sons, David Duncan and Tim Duncan, currently oversee Silver Oak Cellars along with Twomey Cellars. In addition, Duncan founded the Durango Mountain "Purgatory" Ski Resort in 1965 and held the position of chairman at Colorado Ski Country USA. His contributions to skiing earned him a place in the Colorado Ski and Snowboard Hall of Fame in 2006.

In 2012, Junior Achievement-Rocky Mountain and the Denver Metro Chamber of Commerce honored Duncan by inducting him into the Colorado Business Hall of Fame.

Biography

Duncan was born in Illinois in 1930 and completed his studies at the University of Notre Dame in 1952. He relocated to Durango, Colorado in 1958 to support his father’s oil and gas ventures, founding Duncan Oil Inc., which moved its base to Denver by 1968. In 1965, he initiated the Durango Mountain "Purgatory" Ski Resort and subsequently served as chairman of Colorado Ski Country USA.[1][2] His impact on the ski industry was recognized with his induction into the Colorado Ski and Snowboard Hall of Fame in 2006.

During the 1970s, Duncan acquired vineyard land in Napa and Alexander Valleys primarily for grape cultivation. After collaborating with Justin Meyer—who suggested starting a winery—they co-founded Silver Oak in 1972. The winery specialized exclusively in crafting high-quality Cabernet Sauvignon, a focus that continues today.

In 1972, Duncan bought a dairy farm located in Oakville, Napa Valley—the current site of Silver Oak’s Napa winery—and produced their inaugural vintage using grapes from Alexander Valley. The winery adopted a distinctive approach by aging wine solely in American oak barrels for over two years, followed by prolonged bottle maturation prior to release. Silver Oak’s first production totaled 1,100 cases of North Coast Cabernet Sauvignon. By 1979, they began utilizing grapes from their own Napa Valley vineyards for their initial Napa Cabernet Sauvignon bottling.

Between the late 1970s and early 1990s, Silver Oak expanded its vineyard acreage significantly and emerged as a leading name in Cabernet Sauvignon production. In January 2001, co-founder Justin Meyer sold his share to Duncan.

Among Duncan’s accolades are being named Wildcatter of the Year by the Independent Petroleum Association of Mountain States in 1998 and induction into the Rocky Mountain Oil & Gas Hall of Fame in 2004. His philanthropic endeavors benefited institutions such as Notre Dame—where facilities like Duncan Hall and the Duncan Student Center bear his name—as well as cultural and archaeological organizations within Colorado. Additionally, he founded Castle Pines Golf Club.

Ray Duncan died at age 84 on October 9, 2015, in Denver.

Family business and legacy

Duncan’s four sons—Michael, Kevin, Tim, and David—are integral to managing the family ventures. David Duncan holds positions as President and CEO of both Duncan Oil Inc. and Silver Oak, while Tim Duncan serves as Vice President at Silver Oak. Both brothers act as managing partners at Twomey Cellars, the second winery Ray Duncan established alongside his sons. Michael manages Diamond Tail Ranch located in northern Colorado, whereas Kevin functions as vice president at Denver-based Duncan Oil. Pat Kettles of The Anniston Star highlighted Duncan’s strategic emphasis on acquiring vineyards that showcase distinct terroirs along with his dedication to sustainable agriculture practices aimed at safeguarding Silver Oak’s legacy. As recently as 2012, Duncan remained actively engaged with Silver Oak events, personally connecting with patrons during wine release celebrations.

  1. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named CB0112
  2. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named CB0907