Mystik Dan claimed the 150th Kentucky Derby Saturday in a dramatic three-horse photo finish, edging out Sierra Leone and Forever Young for the upset victory.

This was just the 10th Derby to be decided by a nose, the closest margin in horse racing.

Starting off at 18-1 odds, Mystik Dan and jockey Brian Hernandez Jr. rode the rail down the stretch with a short lead.

Sierra Leone and Forever Young from Japan gave chase and pressured the leader to the wire in front of more than 150,000 at Churchill Downs.

Hernandez and trainer Kenny McPeek had teamed to win the Kentucky Oaks for fillies just a day earlier with Thorpedo Anna.

Mystik Dan ran 1 1/4 miles in 2:03.34 and paid $39.22 to win.

This was the closest finish since 1996 when Grindstone beat Cavonnier by a nose and the closest three-way finish since 1947.