Cascade is one of 'the 4 Cs', along with Centennial, Chinook and Colombus that are responsible for a large proportion of modern American beers. It’s also found in New Zealand, for example. Released in 1972 having been developed by the USDA in Oregon (a cross between fuggles and Russian Serebrianker), it’s an aroma hop providing trademark fruity and floral notes, spice and bitter citrus. Hugely popular with craft brewers, it’s used in American Pale Ales especially, but also other American ales, Porters, Witbiers and Barley Wines. Possible alternatives include Centennial and Amarillo.