The Chinook is a rare breed of sled dog developed in New Hampshire in the early 1900s by Arthur Walden, a gold rush adventurer and dog driver, and is a blend of English Mastiff, Greenland Dog, German Shepherd Dog, and Belgian Shepherd. It is the state dog of New Hampshire and was recognized by the American Kennel Club in the Working Group in 2013. They are described as athletic and "hard bodied" with a "tireless gait". Their coat color is always tawny, ranging from a pale honey color to reddish-gold.