This detailed history, written by two key participants in the snowmobile program, describes the development of John Deere snowmobiles from start to finish: the design and engineering decisions that shaped each important model; reception of the snowmobiles by consumers; the factory race teams; the introduction of front-engine and water-cooled models; the process of selecting engines and negotiating with suppliers, including when problems developed; and the snowmobiles' impact on product engineering. The text provides an inside view of Deere's Consumer Products Division at a time of rapid growth, and of the people and processes that made it all happen.