Winery Directory

MacRostie Winery is located in Healdsburg in the Russian River Valley and produces Chardonnay, Pinot Noir, Sauvignon Blanc, rosé, and sparkling wines. The winery has access to vineyard diversity across the Sonoma Coast and is known for bright, balanced, and complex wines.

Margerum Wine Company is a winery located in Santa Barbara's Funk Zone that produces handcrafted wines using old-world techniques. The company is known for its M5 Red blend and focuses on wines that reflect their growing regions. The tasting room offers wine by the glass, curated flights, and a full kitchen with seasonal food pairings.

Marietta Cellars is a second-generation family-owned winery in Sonoma County, California that has been crafting wine since 1978. The winery sources fruit from estates it farms sustainably and produces wines through hands-on winemaking under owner and winemaker Scot Bilbro.

Marine Layer Wines is a Sonoma Coast-focused winery in Healdsburg, CA, founded by Baron Ziegler with winemaker Rob Fischer. The winery sources exclusively from the best vineyards in the Sonoma Coast region and specializes in cool-climate Pinot Noir and Chardonnay, utilizing sustainable farming practices, heritage clones, and hand-harvesting.

Markham Vineyards is a St. Helena, California winery that has operated for 45 years as a leader in crafting Bordeaux varietals in Napa Valley, with Merlot as its flagship wine. The winery manages 260 acres of sustainably farmed estate vineyards across multiple Napa Valley micro-sites and was among the first California wineries to specialize in Merlot.

Martinelli Vineyards and Winery is a family-owned winery in Windsor, California that has been farming estate vineyards for over 135 years since the 1880s. The winery operates 470 acres of sustainably-farmed vineyards across Russian River Valley, Green Valley, and Fort Ross-Seaview appellations, producing Chardonnay, Pinot Noir, Zinfandel, Syrah, and Muscat of Alexandria. The family offers small-production, vineyard-designated wines and hosts tastings at their historic turn-of-the-century hop barn in Russian River Valley.

Martorana Family Winery, located on Dry Creek Ranch in Healdsburg, produces organically-grown wines and is known for its sustainable practices, including earning the Wildlife Stewardship Award from the Association of Fish & Wildlife Agencies. The winery, which traces its Italian heritage back to the Accornero family in Santo Stefano, Italy, offers varietals including Sauvignon Blanc, Chardonnay, Zinfandel, Merlot, Petite Sirah, and Cabernet Sauvignon, along with olive oil production.

Matchbook Wine Company is a family-owned winery in Yolo County, California, located in the Dunnigan Hills appellation. Founded by fifth-generation farmers John and Karl Giguiere, the winery produces wines from its own vineyards using a combination of traditional and innovative winemaking techniques, including regenerative farming practices. The winery became California Certified Sustainable in 2022.

Mathew Bruno is a limited production winery located in Rutherford, Napa Valley, focusing on Cabernet Sauvignon sourced from prestigious vineyards throughout the region. The winery, founded by Mathew Bruno following his inaugural 2009 vintage, also produces Pinot Noir, Chardonnay, Sauvignon Blanc, and sparkling wines. The Bruno family, originally from Southern Italy with three generations in agriculture, operates a tasting room by appointment at their Rutherford Estate.

Matthiasson Wines is a small, independently owned family winery in Napa Valley founded in 2003 by Jill and Steve Matthiasson. The winery produces organic wines from familiar varieties like Chardonnay and Cabernet Sauvignon as well as rare varieties including Ribolla Gialla and Refosco, focusing on hand-tended vineyards and moderate-alcohol wines intended to be refreshing and food-friendly.

Mauritson Family Winery is located in Dry Creek Valley near Healdsburg and produces small-lot, handcrafted wines from Dry Creek, Rockpile, and Alexander Valleys. The family has been farming in the region for more than 150 years and now operates a tasting room offering seated tastings and single-vineyard releases from Rockpile AVA.

Maxville Winery is located in Napa Valley's Chiles Valley AVA, spanning over 1,000 acres with 700 acres permanently preserved under the Napa Valley Land Trust. The winery produces handcrafted wines from estate-grown vineyards using small open-top fermentation tanks, with some vines dating to 1974. The property features a renovated winery, barrel-aging caves, and a private lake surrounded by native oak trees.

MCV Wines opened in 2011 in Paso Robles and is known for producing Petite Sirah from high-quality grapes sourced from the Paso Robles AVA. The winery describes the varietal as dark, rich, smooth, elegant, bold, and age-able.

Medlock Ames is a winery in Healdsburg, California that organically farms Bell Mountain Ranch in Alexander Valley using regenerative agriculture practices for over 20 years. The winery produces Cabernet Sauvignon, Cabernet Franc, Merlot, Syrah, Chardonnay, and Sauvignon Blanc, with their Cabernet Sauvignon offerings receiving critical acclaim.

Melville Winery is a 100% estate winery founded in 1996 located in Lompoc, California in the Sta. Rita Hills region of Santa Barbara County. The winery produces Pinot Noir, Chardonnay, Syrah, and Grenache from vineyards it owns and operates using organic and sustainable farming practices.

Mending Wall is a boutique, family-owned winery in Napa Valley's St. Helena founded on collaboration between celebrated winemaker Thomas Rivers Brown and longtime Napa Valley stewards. The winery produces limited-production wines from Napa Valley's distinctive vineyards, focusing on purity, balance, and terroir expression.

Merry Edwards Winery is located in the Russian River Valley and produces single-vineyard Pinot Noirs. Founded in 1997, the winery and all of its vineyards are Certified California Sustainable. The winery is now owned by Maison Louis Roederer as part of the Roederer Collection.

Mesa Vineyard Management, Inc. is a vineyard management company based in Templeton, CA that was founded in 1989. The company specializes in premium vineyard management services across San Benito, Monterey, San Luis Obispo, and Santa Barbara counties on California's Central Coast, and has expanded to the Willamette Valley and Umpqua Valley in Oregon. It also operates Mesa Vineyard Custom Services, a subsidiary providing vineyard construction and mechanical harvesting services.

Mia Marie Vineyards is a family-owned estate winery on 105 acres in Highland Valley, San Diego County, featuring craft wines made from grapes cultivated on-site. The vineyard grows Cabernet Sauvignon, Malbec, Tempranillo, Merlot, Sangiovese, Montepulciano, Sauvignon Blanc, Muscat, Viognier, Petite Sirah, and Grenache. The winery offers tastings in a full-service tasting room with scenic views and operates a wine club.

Mira Winery is a family-owned winery located in Napa Valley that has been crafting wine since 2009. The winery is known for producing critically acclaimed wines, including Cabernet Sauvignon.

Mi Sueño Winery is located in Napa, California and operates eight estate vineyards. The winery produces Chardonnay, Cabernet Sauvignon, Pinot Noir, Syrah, Tempranillo, Rosé, and a Red Blend, with wines available through direct purchase and a wine club. The winery also produces a limited Herrera Wines collection, with select wines produced in quantities up to 100 cases annually.