Ages are based on your age as of Jan 1st of the racing year. For example, if you are 16 years old on Jan 1, then you are considered 16 years old from Jan 1 to Dec 31. If your 17th birthday is Jan 1, then you are considered 17 years old from Jan 1 to Dec 31. Riders competing in age classes are permitted to participate in the age division one below that in which they are classified. Exception to the above may be allowed. Please ask the Referee or Office Staff.