a US-bred high alpha hop with a spicy, piney hop aroma. This variety was developed by Chuck Zimmermann and released by Steve Kenny in 1985 as part of the United States Department of Agriculture’s (USDA) hop breeding program in Prosser, Washington. It has high α-acids (12%–14% w/w) and high oil content (1.7–2.7 ml/100 g). Relative to other high alpha varieties, Chinook has a low beta-acid content (3%–4%). Its parentage includes the English hops Petham Golding and Brewer’s Gold and a wild American hop from Utah. Chinook matures late, is moderately resistant to downy mildew, and resistant to verticillium wilt, but is somewhat susceptible to virus infection, especially hop mosaic virus. The variety grows best in the Yakima Valley, Washington but not in Oregon, due to downy mildew problems. Its storage stability is fair to good. Chinook is widely used in American pale ales and India pale ales, where they can show clean bitterness and aromatics of pine needles and grapefruit, but are also considered somewhat “catty” when concentrated.