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The Winery


We are grateful to our community for embracing our winery, kindly allowing us to grow out of our current location. While our roots remain in Twin Oaks Valley and we continue to pursue building a state-of-the-art wine production facility and tasting room at 1451 Mulberry Drive in San Marcos, until that facility is complete, we are moving the tasting room and wine production to a NEW LOCATION on Grand Avenue in Escondido.  We would love to save you a seat and fill your glass!

See our Tasting Room hours below.

Our Story


The first vineyards in California were planted right here in San Diego at the Mission San Diego de Alcalá. Our hope is to establish San Diego County as a well known wine region, bringing wine lovers from all over to experience the taste and beauty of our area.

Twin Oaks Valley Winery is a family owned and operated business. Established in 2001, the winery was purchased by Malcolm and Kathryn Gray in 2013 to introduce new and updated winemaking techniques to making old world wines and refresh the brand. We specialize in crafting small batches of wine from the finest grapes grown in San Diego County. As a member of the San Diego County Vintners Association, we are proud to support our local farmers and growers.



Malcolm and Kathryn Gray walking the vineyard
Malcolm Gray, winemaker at Twin Oaks Valley Winery

The Winemaker


Malcolm’s passion for winemaking started with his passion for drinking wine. As an accomplished Electrical Engineer working in Silicon Valley for over 25 years, he would spend weekends at wineries in the Santa Cruz Mountains and the Sierra Foothills that led to extensive, in-depth conversations with the winemakers about grape varieties, climate and soil.  Malcolm began reading everything he could get his hands on about grapes, grape growing regions and the art of making wine.  He then attended enology courses at UC Davis when he realized, “this is what I really want to do”

Malcolm absorbed himself in “everything about wine making”, expanding his knowledge and developing his skills. His efforts paid off, winning a silver medal for the inaugural red blend, 2013 Sunset Red, at the 2016 San Diego Wine and Spirits Challenge.

Custom Crush


Twin Oaks Valley Winery offers you access to our facility and equipment to make your own wine with the assistance of an expert winemaker.

Winery members enjoying the process of winemaking

Giving Back


Twin Oaks Valley Winery and The Gray Family are honored to be part of the City of San Marcos and proud to give back to the community whose generosity has fostered our success. We have focused our support in the following areas: San Marcos Unified School District, San Marcos Parks and Recreation and Efforts to help the homeless in San Diego County.

We have partnered with the Lucky Duck Foundation to produce Midnight Ache, a premium Red Blend in which all the proceeds benefit the Lucky Duck Foundation and their efforts to help the homeless.

San Marcos Unified School District logo
The City of San Marcos logo
Lucky Duck Foundation logo

Our partnerships with the community is ongoing. If you meet the area of focus above and would like the support of Twin Oaks Valley Winery, please complete the following form for consideration. We thank you for all your hard work and wish you much success in your effort to better our community.

Thanks for submitting!


The Gray Family is committed to sustainability throughout the wine making process. Being good land stewards and being sensitive to the environment around the winery operation is our focus. We select only organic based products. All water used in the winery operation is collected and reused to irrigate the vineyard surrounding the operation.

Our Future


As the winery has grown over the years so has the desire to create new wine experiences for our visitors. Twin Oaks Valley Winery strives to educate guests about wine, wine making and their tasting experience.


The next chapter in the Twin Oaks Valley Winery story will be the construction of a new winery next to our current location. It will include a production facility, tasting room with underground expansion, and a dedicated outdoor space for live music and special events.


Our new facility will be situated overlooking the Twin Oaks Valley and will give guests the opportunity to stroll through our Estate Syrah vineyard, sipping on a glass of their favorite Twin Oaks Valley Winery vintage.


Stay tuned for the progress. We hope you will join us on this journey.  

Elevation drawings of the future Twin Oaks Valley Winery tasting room facility
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