Competing for your sport's highest achievement shouldn't be a question, but for horse racing's Triple Crown, it's not that simple.

The attempt to win the Kentucky Derby, the Preakness and the Belmont felt way more impossible just a decade ago.

The Triple Crown is an accomplishment that a select group of horses has achieved throughout history. When a horse wins all "jewel" races in a single season -- the Kentucky Derby, Preakness Stakes and Belmont Stakes -- it's widely regarded as one of the highest honors in all of sports.