Oregon holds 19 AVAs of which 4 are shared with neighbor states, and additional 4 pending by TTB (The Alcohol and Tobacco Tax and Trade Bureau).
Snake River Valley (AVA) is shared between southwestern Idaho and northeastern Oregon. It is home to a number of wineries and vineyards, but all of them reside on the Idaho side. Similarly, the Rocks District of Milton-Freewater has no wineries.
Red Hill Douglas County Oregon AVA has one vineyard - Red Hill Vineyard, it's proprietor Wayne Hitchings died in 2016, so now the vineyard is only selling fruit to other winemakers in Oregon.