Street Sense and Curlin were among 141 horses pre-entered for the 11-race , $ 23 million thoroughbred world championships October 26-27 at Monmouth Park in Oceanport , N.J. Twenty horses from Europe will be racing in the Breeders ' Cup , including a pair of Aidan O 'Brien-trained four-year-olds , Prix de l 'Arc de Triomphe champion Dylan Thomas in the $ 3 million Turf and George Washington in the $ 5 million Classic .