Rosenblum Cellars was founded in 1978 in Alameda County. The winery is unusual in that it is located in the East Bay just across from San Francisco. It was founded by Kent Rosenblum, a veterinarian with an interest in wine, and today the business is still run by the Rosenblum family. The winery makes a large selection of wines sourced from grapes grown in virtually every region of California, from Sonoma and Paso Robles, to Contra Costa, Santa Barbara and Mendocino. Rosenblum makes about 50 wines a year. They are known for Zinfandels, Rhone-style reds and whites, and dessert wines. Many of the wines are vineyard-designated.
Russian River Valley AVA is named for the river that meanders from Mendocino County in the north until it finally runs into the Pacific Ocean north of San Francisco. The AVA is cool thanks to its proximity to the northern California coast and the river, and grape growers must learn to deal with regular fog. Nevertheless in recent decades the AVA has become one of the best in the state, meaning that its wines often earn excellent reviews and have considerable cachet. The AVA status was awarded in 1983 and today the appellation has 15,000 vineyard acres. Chardonnay is the most widely planted grape though Pinot Noir has also been very successful in recent decades. Russian River Valley Pinot Noir are known for being rich, lush and filled with concentrated fruit and berry flavors. Russian River Pinot Noirs are today considered some of the best domestic Pinot Noirs.
Zinfandel is a black-skinned grape, but 85% of the wine produced is made into a rosy “White Zinfandel.” Red Zin is far more complex and bold, while still being light-bodied. It grows in popularity as winemakers continue to experiment with new styles and blends.