Horses take to the track in the wee hours of the morning Thursday at Churchill Downs, site of the Breeders' Cup races Friday and Saturday.

Horses beat the crowds by working in the predawn hours at Churchill Downs.

Breeders' Cup entrants Announce, left, Byword, center, and Brigantin walks onto the Churchill Downs track.

Trainer Larry Jones gets aboard his Classic entrant, Havre de Grace, for her morning gallop Thursday. Havre de Grace is attempting to join Zenyatta as the only fillies to win the Classic.

Juvenile hopeful Drill gallops over the track. Trained by Bob Baffert, Drill is 8-1 on the morning line.

A colorful sky welcomes horses onto the Churchill Downs racetrack.

Juvenile Fillies runner Northern Passion gets some exercise. She's 12-1 for her first race outside Canada.

Goldikova, trained by Freddy Head, lets loose the track during a morning exercise session. She has won the Breeders' Cup Mile three straight years and is going for No. 4 on Saturday.

Cambina, a 30-1 long shot in the Filly & Mar Turf, makes her last trip to the Churchill Downs track before she races Friday.

Game On Dude gets the blood flowing Thursday morning. He's 10-1 in the Classic.

Plum Pretty, trained by Bob Baffert, gallops at Churchill Downs. She is the 2-1 favorite for the Ladies' Classic on Friday.

A group of Breeders' Cup entrants walk over the Churchill Downs track just after daybreak Wednesday. The Breeders' Cup begins Friday with six races and concludes Saturday with nine races.

Breeders' Cup Turf hopeful Sea Moon gallops over the turf course during morning workouts. The 3-year-old is 4-1 on the morning line.

Somali Lemonade gets in some exercise. She has 3-1 odds in the Juvenile Fillies Turf.

In the darkness, a horse is led onto the track during morning workouts.

Elusive Kate gallops at Churchill Downs. After winning four races in Europe, she's the 2-1 favorite for the Juvenile Fillies Turf.

With the exercise rider staying warm, Irrefutable goes out for a gallop. The 5-year-old is 12-1 for the Dirt Mile.

My Gi Gi gallops as she tunes up for the Breeders' Cup Juvenile Fillies Turf. She's 20-1 after drawing the rail post position.

Northern Passion stays loose as the Breeders' Cup approaches. She's 12-1 in the Juvenile Fillies.

Goldikova gallops as she attempts to win the Mile four the fourth straight year. Last year, she became the first horse to win any Breeders' Cup race three straight years.

Holiday for Kitten exercises on the Churchill Downs turf course. The 3-year-old filly is 30-1 in the Turf Sprint.

Vexor, trained by John Kimmel, jobs on the track. He's 5-1 in the Juvenile Sprint after drawing the outside post.

Among the early groups to hit the track, Mile starter Byword gallops. He's 12-1 but is trained by Andre Fabre, who has pulled off a few Breeders' Cup upsets.

Juvenile Filly & Mare Turf hopeful Perfect Shirl in in full stride during morning exercise. She's a 30-1 long shot, winless in six races this year.

Pleasant Prince looks a bit distracted as he prepares for his start in the Breeders' Cup Marathon. He's 12-1 on the morning line.

Churchill Downs will host the Breeders' Cup for the second straight year.

Havre de Grace gets in a gallop. The 4-year-old filly, the leading contender for Horse of the Year, is entered against males in the Breeders' Cup Classic.

Breeders' Cup Juvenile Fillies Turf hopeful Elusive Kate gallops.

Breeders' Cup Filly & Mare Sprint hopeful Musical Romance walks onto the track.

Sea Moon, trained by Micahel Stoute, jogs on the turf track. He's listed at 4-1 for the Turf.

Turf Sprint hopeful Great Attack gallops over the turf course. He's a 20-1 long shot.