Chinook hops are a product of the USDA breeding program in Washington State. It was originally bred as a bittering hop back in 1985, but has recently been recognized as a dual-purpose hop that is well rounded and suited for many different styles. It has predominately spicy and piney characteristics that transfer through into the flavor and aroma. Chinook also contributes bright grapefruit notes that accentuate its clean bitterness.
Info From Yakima Valley Hops