Morgan Twain-Peterson grew up at Ravenswood and made his first wine at five. One of two California Masters of Wine, he's made Bedrock a voice for old-vine preservation. The Bedrock Vineyard, on a Civil War-era farm, is Regenerative Organic Certified; the tasting room fills General Hooker's 1854 Sonoma home.
Bedrock Wine Co. was founded in 2007 by Morgan Twain-Peterson, son of Ravenswood founder Joel Peterson and one of only two California winemakers to have earned the Master of Wine designation. The project's name comes from the Bedrock Vineyard — a 129-year-old planting on the historic Sonoma Valley farm originally established by General William Tecumseh Sherman and General Joseph Hooker before the Civil War. The Petersons acquired the vineyard in 2005 and have since dedicated themselves to preserving and rehabilitating old vines across California. Bedrock's portfolio is built around heritage field blends, single-vineyard Zinfandel, Syrah, and Cabernet Sauvignon, with a particular focus on vineyards planted before 1900.
Old Vine Zinfandel, California — The flagship; a field-blend of ~80-year-old-vine fruit from a murderer's row of historic sites, widely called the best value in old-school red wine.
Bedrock Vineyard Heritage Red, Sonoma Valley — From the Peterson family's home vineyard of 120-year-old interplanted vines; Wine Spectator 97 points.
Ode to Lulu Rosé, Sonoma Valley — An old-vine Mourvèdre rosé in homage to Bandol's Domaine Tempier.
Sauvignon Blanc, Sonoma Valley — A crisp, savory white from Morgan Twain-Peterson, California's first Master of Wine winemaker.
Syrah, California — A multi-site Syrah that, with the Old Vine Zin, helped build Bedrock's cult following.
The Sonoma Plaza tasting room occupies the 1854 home of General Joseph Hooker — the same Hooker who founded the Bedrock Vineyard before the war. When the building came up for lease in 2017, Twain-Peterson took it, reuniting the historic house with the wines from its original vineyard. Tastings are intimate (capacity for groups of four; larger groups by appointment), focused on the history of Sonoma Valley old vines, and structured to show breadth across the portfolio. In 2025, Bedrock Vineyard achieved Regenerative Organic Certification, placing the project among a small group of leaders in progressive California farming. The wines have appeared three times on Wine Spectator's Top 100, earned multiple 90+ scores from major critics, and earned the winery a deserved reputation as a torchbearer for the "New California" movement. Open Monday–Sunday 10am–4:30pm. Reservations strongly recommended.
Morgan Twain-Peterson grew up making wine alongside his father, Joel Peterson, the founder of Ravenswood, and bottled his first wine as a child. He studied history and political science at Vassar and began a master's at Columbia — working at a New York wine shop where he met future partner Chris Cottrell — before returning west to work harvests at Ravenswood, in Australia, and at Château Lynch-Bages in Bordeaux. He founded Bedrock Wine Co. in 2007 out of a converted chicken coop, building it into one of California's most acclaimed labels with a mission of preserving the state's historic old-vine vineyards, anchored by the 19th-century Bedrock Vineyard in Sonoma Valley. He was named San Francisco Chronicle Co-Winemaker of the Year in 2014 and in 2017 became one of the first California winemakers to earn the Master of Wine title; Bedrock was Antonio Galloni's Winery of the Year in 2020.
Chris Cottrell met Morgan Twain-Peterson behind the counter of a New York wine shop, and the friendship eventually drew him across the country to Bedrock Wine Co. After six years of Morgan working alone — first out of a converted Sonoma chicken coop — Cottrell joined formally in 2012 as the first outsider to become a partner in the mission-driven winery, which is devoted to seeking out and preserving California’s oldest vineyards. As partner, he helps lead a small team championing heritage field blends and old-vine Zinfandel from sites planted as far back as the 1850s.
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Old Vine Zinfandel, California — The flagship; a field-blend of ~80-year-old-vine fruit from a murderer's row of historic sites, widely called the best value in old-school red wine.
Bedrock Vineyard Heritage Red, Sonoma Valley — From the Peterson family's home vineyard of 120-year-old interplanted vines; Wine Spectator 97 points.
Ode to Lulu Rosé, Sonoma Valley — An old-vine Mourvèdre rosé in homage to Bandol's Domaine Tempier.
Sauvignon Blanc, Sonoma Valley — A crisp, savory white from Morgan Twain-Peterson, California's first Master of Wine winemaker.
Syrah, California — A multi-site Syrah that, with the Old Vine Zin, helped build Bedrock's cult following.
Bedrock Wine Co. was founded in 2007 by Morgan Twain-Peterson, son of Ravenswood founder Joel Peterson and one of only two California winemakers to have earned the Master of Wine designation. The project's name comes from the Bedrock Vineyard — a 129-year-old planting on the historic Sonoma Valley farm originally established by General William Tecumseh Sherman and General Joseph Hooker before the Civil War. The Petersons acquired the vineyard in 2005 and have since dedicated themselves to preserving and rehabilitating old vines across California. Bedrock's portfolio is built around heritage field blends, single-vineyard Zinfandel, Syrah, and Cabernet Sauvignon, with a particular focus on vineyards planted before 1900.
The Sonoma Plaza tasting room occupies the 1854 home of General Joseph Hooker — the same Hooker who founded the Bedrock Vineyard before the war. When the building came up for lease in 2017, Twain-Peterson took it, reuniting the historic house with the wines from its original vineyard. Tastings are intimate (capacity for groups of four; larger groups by appointment), focused on the history of Sonoma Valley old vines, and structured to show breadth across the portfolio. In 2025, Bedrock Vineyard achieved Regenerative Organic Certification, placing the project among a small group of leaders in progressive California farming. The wines have appeared three times on Wine Spectator's Top 100, earned multiple 90+ scores from major critics, and earned the winery a deserved reputation as a torchbearer for the "New California" movement. Open Monday–Sunday 10am–4:30pm. Reservations strongly recommended.
Morgan Twain-Peterson grew up making wine alongside his father, Joel Peterson, the founder of Ravenswood, and bottled his first wine as a child. He studied history and political science at Vassar and began a master's at Columbia — working at a New York wine shop where he met future partner Chris Cottrell — before returning west to work harvests at Ravenswood, in Australia, and at Château Lynch-Bages in Bordeaux. He founded Bedrock Wine Co. in 2007 out of a converted chicken coop, building it into one of California's most acclaimed labels with a mission of preserving the state's historic old-vine vineyards, anchored by the 19th-century Bedrock Vineyard in Sonoma Valley. He was named San Francisco Chronicle Co-Winemaker of the Year in 2014 and in 2017 became one of the first California winemakers to earn the Master of Wine title; Bedrock was Antonio Galloni's Winery of the Year in 2020.
Chris Cottrell met Morgan Twain-Peterson behind the counter of a New York wine shop, and the friendship eventually drew him across the country to Bedrock Wine Co. After six years of Morgan working alone — first out of a converted Sonoma chicken coop — Cottrell joined formally in 2012 as the first outsider to become a partner in the mission-driven winery, which is devoted to seeking out and preserving California’s oldest vineyards. As partner, he helps lead a small team championing heritage field blends and old-vine Zinfandel from sites planted as far back as the 1850s.
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