The richest horse race in North America belongs to Sierra Leone. Del Mar Racetrack in California played host to the $7 million Breeders’ Cup Classic on Saturday, pitting the top thoroughbreds ages three years and up against each other in arguably the most stacked field of the season.

Sierra Leone stalked Fierceness and Forever Young in the stretch, then blazed by them to snatch the biggest race of them all from their grasp. Here's how he did it.

Saturday's $7 million Grade I Longines Breeders' Cup Classic at Del Mar takes international racing to a new level with the three best 3-year-olds in the world lining up for dramatic showdown.