Twomey's 2009 Russian River Valley Pinot noir was awarded first place in the American Wine Society's National Tasting Project in 2012.

[11][12] Twomey’s Calistoga winery, which is surrounded by a Sauvignon blanc vineyard, is situated in a palatial farmhouse-like building, featuring an open tasting room with sleek slate floors and a black, polished bar.

[14] This winery, dedicated to the production of Pinot noir and Sauvignon blanc, has glass walls and curving roofs shaped like the contours of the nearby hills.

[13] The winery was overhauled for a period of about 2 years to convert it into a Pinot noir production facility, introducing small (2- and 5-ton) open top fermentors, with temperature closely controlled by separate heating and chilling plates.

During his tenure at Etablissement Jean-Pierre Moueix, he was responsible for the production of their line-up of wines from Pomerol and St. Emilion, including the Chateau Petrus.

Their sources of fruit for their Merlot, Pinot noir and Sauvignon blanc wines come from estate-owned vineyards in the Napa, Russian River and Anderson Valleys, and from independent partner growers who have a contract with Twomey to grow grapes for them.

The Duncan family’s purchase of the Soda Canyon Ranch vineyard in 1999 in southeastern Napa Valley was the impetus for Twomey’s creation.

Soda Canyon Ranch Vineyard is located in the rolling hills of southeastern Napa Valley and its volcanic soils are tightly planted with French Merlot clones.

With modest alcohol, it brims with flavors of black and red currant, licorice, anise and white pepper, as well as a subtle touch of sweet, smoky new oak.

"[9] Twomey's 2009 Russian River Valley Pinot noir was awarded first place in the American Wine Society's National Tasting Project in 2012.

[5] Eric Asimov of The New York Times cited Twomey's 2009 Anderson Valley Pinot noir as "one of our favorites, bigger and softer but with both finesse and intensity.

[32] They say of it: "Made from organically farmed fruit, the wine is crafted in a forward style, featuring aromas of sweet strawberry and wild raspberries on the nose and repeated on the palate where they are joined by lush, ripe berries and undercurrents of red currants and violets, all built on a graceful framework with a fine balance between tannins and acidity.

"[33] The San Francisco Chronicle notes the quiet ambiance of Twomey's wineries, describing them as "an elegant escape from the typical, crowded tourist destinations nearby.