Our Story
The gem of the Santa Cruz Mountains, Byington Vineyard & Winery sits on 85 mountainous acres surrounded by redwood forests with a view to the Monterey Bay. Byington produces award-winning Pinot Noir, Cabernet Sauvignon, Chardonnay, and other exciting varietals that highlight the diversity of Northern California.
Established in 1987, the winery is focused on growing and producing premium wines, farmed sustainably using biodynamic growing methods. Our high-quality, small-production wines come from our ultra-premium Estate vineyards: 8 acres of Byington Estate Pinot Noir in the Santa Cruz Mountains and 30 acres of Tin Cross Vineyards Cabernet Sauvignon, Chardonnay, Cabernet Franc, Merlot, and Petit Verdot from Alexander Valley. We purchase additional varietals from select vineyards for an expansive array of wines.
Biographies
Benny Madsen
Owner
Benny is a Danish national who quickly established himself as an innovator in wireless system design. He has 19 patented inventions in the United States and Europe and is widely seen as a leading engineer and wireless industry visionary. He played a principal development role in the first GSM mobile phone at Dancall Radio A/S, was Technical Director at National Semiconductor, then co-founded and served as CEO and Chairman of LitePoint, a leading provider of test solutions for the world’s leading manufacturers of wireless devices. Outside of high tech, Benny is the owner of Los Altos Vineyards and Oceans Royale. Los Altos Vineyards owns Byington Vineyard & Winery in Los Gatos and Tin Cross Vineyards in Alexander Valley (Sonoma).
Theresa Heredia
Winemaker
Theresa brings more than two decades of acclaimed winemaking experience to Byington. She earned a bachelor’s degree in biochemistry from California Polytechnic State University, San Luis Obispo, and pursued graduate studies in chemistry and viticulture and enology at the University of California, Davis. After her first harvest at Saintsbury in 2001, Theresa joined Joseph Phelps Vineyards and helped develop its Freestone project. She later served as winemaker and Director of Winemaking at Gary Farrell Vineyards & Winery before establishing Heredia Wine Consulting. Her thoughtful, site-focused approach emphasizes vineyard character, vibrant natural acidity, balance, and a clear sense of place.
Jason Rothenberger
Assistant Winemaker
Jason has been an integral part of the Byington team since August 2022. He began as our Cellar Master, developing a detailed understanding of our wines, cellar, and winemaking operations through hands-on work across each vintage. In 2026, Jason was promoted to Assistant Winemaker. His practical cellar experience and continuity at Byington help guide each wine from vineyard to bottle with careful attention to fruit quality, balance, and the individual character of every vintage.
Gallery
Watch our drone video
Community Involvement
Byington supports hundreds of non-profits requesting donations for their charity auctions. We issue more than 350 charity auction gift certificates for these non-profits every year for a wine tour and tasting for 10, a $350 value. We’ve continued this tradition that the Byingtons started since we purchased the winery in 2012. We have supported more than 2,500 charity events since 2012. Anyone can learn more about this at our website. We welcome non-profits and volunteers helping them to make requests for their charity auctions as well.









