Ribbon Ridge AVA is a very regular spur of ocean sediment uplift off the northwest end of the Chehalem Mountains, containing a relatively uniform 5 1/4 square miles (3,350 acres) of land. Approximately 500 acres are currently planted on the ridge, within 20 vineyards. The AVA is distinguished by uniform, unique ocean sedimentary soils and a geography that is protected climatically by the larger landmasses surrounding it. Paucity of aquifers forces most vineyards to be dry farmed. Ribbon Ridge is contained within the larger Chehalem Mountains AVA.