The Chehalem Mountains AVA is an American Viticultural Area located in the Clackamas, Yamhill, and Washington counties of northwestern Oregon. It is entirely contained within the Willamette Valley AVA. The region stretches 20 miles (32 km) from Wilsonville in the southeast to Forest Grove in the northwest. The Chehalem Mountains includes Ribbon Ridge, Parrett Mountain, and Bald Peak. The petition process for the creation of the AVA began in 2001 and was led by David Adelsheim of Adelsheim Vineyard.