On May 31st, 1976, about 200 well-muscled animals lined up in Frankfort, New York, ready for the race of a lifetime. Bred to perfection, there were Arabian stallions, arch-necked and strong-boned and favored to win by almost all observers and Icelandic ponies, famous for their smooth gait and Viking pedigree. There were the tall Irish thoroughbreds, and there were striking Appaloosas. And then there was Lord Fauntleroy the mule.
"The 1976 Great American Horse Race Was Won by a Mule Named Lord Fauntleroy" is from atlasobscura.com, published on August 8, 2016.