May Carleton was a notable figure in the early 20th century, recognized for her contributions to the field of horse racing. She was known for her expertise in training and managing racehorses, which earned her respect in a predominantly male industry. In addition to her work with horses, May Carleton was also associated with the famous racehorse Man o' War, one of the most celebrated thoroughbreds in history. Her involvement with such a prominent horse helped solidify her reputation and influence within the sport.