MERCIER winery is located on Old River Road, between the communities of Hopland and Ukiah in Mendocino County, California. The vineyard is located on 2 +/- acres of leased land in the McNabb Ranch area, also between Hopland and Ukiah, which is on the west side of Mendocino Valley.

Andrea Swanton and Michael Mercier started the winery in 1998, with the goal of producing a very high quality Merlot that would be rich in flavor, smooth and develop complexity as it aged. They agreed to strict farming and wine production guidelines subject to Mother Nature's whims in any given year.

Michael's passion for wine started at Ohio State University, were he wrote a thesis on vineyard cultural practices for the production of fine wine in 1980. Andrea's love for wine making developed quickly during her time spent in Northern California while the winery was being built, and crystallized upon her first crush.