The Eagle River Derby is an annual snowmobile race held in Eagle River, Wisconsin. It is one of the most prestigious events in the snowmobile racing calendar, attracting competitors and spectators from across the country. The race features various classes, including professional and amateur divisions, and takes place on a specially designed oval track. The event typically occurs in January and includes multiple races over several days. In addition to the main race, the Eagle River Derby often features activities such as vendor booths, food stands, and entertainment, making it a popular winter festival for families and racing enthusiasts alike.