Mayorth was a blue dragon early in the Third Pass. His rider was B'carran.
Mayorth and his rider were one of the many weyrlings who, during the Third Pass, timed it back three years to the Far Western Continent so that they could grow up and be ready to fight Thread in the present time.
Prior to the establishment of Eastern Weyr's proper buildings, Mayorth was attacked by a feline, resulting in his wing being torn. Fiona dressed his wounds and reassured B'carran that he would be fine.