De Leyer started training him to be a show jumper and started winning prestigious shows just two years after being saved from slaughter. Snowman went on to be the United States Open Jumper Champion in 1958 and 1959. He would jump anything...even another horse:
Snowman had such a wonderful temperament that he even won the leadline class and the open jumper class in the same show. For those who don't know, the leadline class is for children under 7 who show their equitation skills at a walk and a trot while their horse is being led and controlled by an older child or adult. It is amazing that Snowman was so calm that he could be a leadline horse AND a show jumper. The horse was well-loved by the entire de Leyer family as is evidenced by this picture:Show Jumping Hall of Fame in 1992.