There is a filly that won the Triple Crown but it is the Filly Triple Crown also known as the Triple Tiara. The horse name is Ruffian. This horse is the first filly to win the Triple Crown.
Ruffian won the Triple Tiara in 1975, then called the Filly Triple Crown. She was undefeated in her first 10 races.
Not the US Triple Crown. But he did win the UK Triple Crown.
Seabiscuit didn't win the Triple Crown
No, Northern Dancer didn't win the Triple Crown.
Secretariat was the largest horse to win the Triple Crown.
Yes, he won the 1973 triple crown
Yes, he was the 10th Triple Crown winner
No the last triple crown winner was Affirmed 1978
No woman has won the Triple Crown as a jockey.
No, Seabiscuit never raced in any of the Triple crown races.
Secretariat became the first horse in 25 years to win the Triple Crown in 1973.