Looking for a unique location for your wedding? At Hannah Nicole Winery, our goal is to make each event memorable. Hannah Nicole Vineyards & Winery is located at the foot of Mt. Diablo in Contra Costa County, California. As landmark winery in this part of the prosperous Bay Area we are keeping alive the century old heritage of winemaking in one of California’s most acknowledged farming communities. The warm summer days, cool nights and howling winds off the nearby Sacramento Delta over our clay-loam soil produce grapes of well balanced acidity and elegant freshness.