i would say probably the Kentucky derby at Churchill Downs in Louisville Kentucky
Kentucky
Secretariat/Red
secretariat
it is the name of a famous race horse. A movie was made about this horse.
You're probably after a horse from America, but in Australia there's a mare called Black Caviar. 20 runs, unbeatean.
phar lap
Race Horse
Barbaro is a famous race horse.
It's the Kentucky Derby. The race course is in Louisville, Kentucky
phar lap
A famous race that starts with a T might include the Triple Crown. This is a combination of three horse races. The Travers Stakes is another famous "T" race. The winner of the most recent Travers Stakes race was Take Charge.
That would most likely be the Kentucky derby, Part of the Triple Crown, in Louisville Kentucky.