There is no harness horse triple crown
The "Triple Crown" is usually referring to the "Triple Crown of Thoroughbred Racing". There are three races: The Kentucky Derby, the Preakness Stakes and the Belmont Stakes.
The Kentucky Derby, then the Preakness, and finally the Belmont Stakes.
The Kentucky Derby, The Preakness, and The Belmont
Silver Charm won the first two triple crown races (the Derby and the Preakness). Touch Gold won the Belmont...so no triple crown winner in 1997.
Triple crown is three Americans races for colts and fillies. The races are: Kentucky Derby, Belmont Stakes and Preakness Stakes
No horse has ever won the Triple Crown twice because they can only race in the Triple Crown races as three year olds.
The American Triple Crown races were in existence long before they became the Triple Crown. the governing body of horse racing at the time decided that the USA needed a Triple Crown for Thoroughbreds, as there was one already in existence in England where Thoroughbreds were originally created. The Kentucky Derby, Preakness Stakes and Belmont Stakes were chosen due to their length and prestige.
During any given year there are thousands of horse races run in the US. Therefore, it would be better to ask which horse races are part of the Triple Crown. Those races are the Kentucky Derby, the Preakness Stakes, and the Belmont Stakes.
There were 11 Triple Crown winners and the most famous was Secretariat in 1973. The first Triple Crown winner was Sir Barton in 1919. If you're into horse racing, you should check out a really cool racing game called horseracegame. The reason why I mention this game is because you can actually jockey and fictitiously bet all the Triple Crown winners throughout history. You can even build races combining the Triple Crown horses. My favorite Triple Crown winner was Secretariat. Gee, that's no secret! But I also think Citation who won the Triple Crown in 1948 was a great horse, also. I tried that video game you were talking about and it's been a blast racing the Triple Crown winners.
the Kentucky Derby, the Preakness Stakes, and the Belmont Stakes
She was immature and slow to develop