Ismael "Milo" Valenzuela (December 25, 1934, in McNary, Texas – September 2, 2009, in Arcadia, California) was a Thoroughbred horse racing Hall of Fame jockey. He was one of 22 children born to parents who had immigrated to the United States. Shortly after Valenzuela's birth, the family returned to their native Mexico. At age 14, Valenzuela came back to the United States where he began working with quarter horses, then launched his career as a jockey at a racetrack in Tucson, Arizona. He eventually began riding in California and came to national prominence as a jockey competing for the American Triple Crown of Thoroughbred Racing.