I live in Alaska and there are no age limits other than you cannot be over 9 years old to race in the mini quad class. I have 4 kids ages 6, 10, 12 and 14 and the older three race blasters in the novice class. I always thought it was kind of amusing that according to the CPSC my kids should all be riding mini quads and the state racing rules say they cannot race mini quads because they are too old. By the way, the 10 year old actually won 2 motos in a row on his blaster (no mods) against all sorts of full size quads.