The Ribbon Ridge AVA is an American Viticultural Area in Yamhill County, Oregon. It is the smallest AVA in Oregon and is entirely contained within the Chehalem Mountains AVA, which in turn is entirely contained within the larger Willamette Valley AVA. Ribbon Ridge stretches between the towns of Newberg and Gaston. The ridge is defined by local geographic boundaries and an uplift of ocean sediment. It lies at 45° 21' N latitude and 123° 04' W longitude, at the northwest end of the Chehalem Mountains. Colby Carter, an early settler from Missouri, named Ribbon Ridge in 1865, and the ridge has been known by that name ever since. The first official use of the Ribbon Ridge name dates to 1888 with the creation of Ribbon Ridge School District No. 68. The ridge is approximately 0.25 mi wide and 3.50 mi long, and is 3350 acre in area, with 500 acre planted on 20 vineyards. It is estimated that between 1000 acre and 1400 acre in the region is suitable for planting.