The Mendocino Ridge AVA is an American Viticultural Area located in coastal Mendocino County, California. The boundaries of the AVA include a range of coastal mountains adjacent to the Pacific Ocean. Although the area included in the AVA is over , the only land suitable for grape cultivation lies above in altitude, above the coastal fog. Most of the land is unsuitable for grape growing, and currently less than are under vine. Nearly all of the plantings in this area are Zinfandel, and grapes have been planted in the valley since the late 1800s. Much of the non-planted land is covered by Redwood and Douglas Fir trees.