William Molter (June 2, 1910 – April 2, 1960) was an American National Champion and Hall of Fame horse trainer in the sport of Thoroughbred racing. A native of Fredericksburg, Texas, Molter began his career in horse racing as a jockey at racetracks across the Texas border in Mexico. He eventually made his way to the bush tracks of Western Canada and at the modern Polo Park Racetrack in Winnipeg, Manitoba won the 1935 edition of the Manitoba Stakes, now known as the Canadian Derby. That year he turned to training horses, making his way to the modern new racetracks being built in California where he enjoyed considerable success. He was the United States Champion Thoroughbred Trainer by wins four straight years between 1946 and 1949, and led all American trainers in earnings four times, winni