 For wines to bear the Snake River Valley AVA label, at least 85% of the grapes used for production must be grown in the designated area, which includes the Southwestern Idaho counties of Ada, Adams, Boise, Canyon, Elmore, Gem, Gooding, Jerome, Owyhee, Payette, Twin Falls, and Washington, and the Eastern Oregon counties of Malheur and Baker.The AVA encompasses 15 wineries, 46 vineyards, and of commercial vineyard production.Located on the same latitude as Oregon's Umpqua Valley AVA, the Snake River Valley has a more drastic diurnal temperature variation than other appellations in the Pacific Northwest due to the high elevation of most of the region's vineyards.