Chinook has large, roundly heart-shaped, mahogany red, glossy fruit, resembling Bing. The flesh is medium to dark, moderatly firm. It ripens 4 to 10 days before Bing. Cracking susceptibility is similar to Bing. The flavor is sweet with lower acidity than Bing.
Chinook is vigorous, upright-spreading, and productive. Chinook blooms slightly before Bing. It is self-infertile; known cross-pollinizers include Bing, Van, or Sam. Chinook belongs to pollen compatibility Group IX (S1S4).
Production and compatibility of Chinook on rootstocks other than Mazzard is unknown at this time. Chinook is susceptible to powdery mildew.