Louis M. Martini WineryMonte Rosso Vineyard MalbecOne of California’s most prized locations for wine grapes, Monte Rosso Vineyard rolls across steep, rugged terrain in the majestic Mayacamas Mountains nearly 1,300 feet above the Sonoma Valley. Owned by the Louis M. Martini Winery since 1938, it is named for its rich, red volcanic soils and has produced award-winning wines for over three generations.