Chehalem Mountains AVA is a single uplifted landmass southwest of Portland in the northern Willamette Valley, extending 20 miles in length and 5 miles in breadth, stretching from southeast to northwest. It includes several discrete spurs, mountains and ridges, such as Ribbon Ridge and Parrott Mountain. The highest point within the Willamette Valley is the Chehalem Mountains’ Bald Peak (at 1,633 feet) which affects weather for the AVA and for adjoining grape growing hillsides. It is the geography and climate that differentiate this AVA from others. All three important hillside soil types are represented: basaltic, ocean sedimentary and loess (blown lake bed sediment), the predominant soil on the northern face of the Chehalem Mountains. Within the almost 70,000 acres of this AVA are over 1,600 acres of grapes, grown in over 100 vineyards, and 31 wineries.