Horses entered in the $500,000 Breeders' Cup Marathon will be running a little longer.

The race's distance has been extended from 1 1/2 miles to 1 3/4 miles for this year's Breeders' Cup world championships Nov. 6-7 at Santa Anita in Arcadia, Calif.

That will make the Marathon the longest major stakes race run on a main track in the U.S. this year.

The new distance was approved by the Breeders' Cup board of directors and announced Friday. Officials said the longer distance will allow the race to start near the six-furlong chute at Santa Anita, giving horses a longer run into the first turn.

The Marathon, run for the first time at last year's Breeders' Cup, was won by Ireland-bred Muhannak.

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