Set Them Free is an American

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 thoroughbred

Thoroughbred

The Thoroughbred is a horse breed best known for its use in horse racing. Although the word thoroughbred is sometimes used to refer to any breed of purebred horse, it technically refers only to the Thoroughbred breed...

 mare

Mare (horse)

A mare is an adult female horse or other equine.In most cases, a mare is a female horse over the age of three, and a filly is a female horse age three and younger. However, in Thoroughbred horse racing, a mare is defined as a female horse more than four years old; in harness racing a mare is a...

 racehorse

Horse racing

Horse racing is an equestrian sport that has a long history. Archaeological records indicate that horse racing occurred in ancient Babylon, Syria, and Egypt. Both chariot and mounted horse racing were events in the ancient Greek Olympics by 648 BC...

. She is sired by stakes

Graded stakes race

A graded stakes race is a term applied since 1973 by the American Graded Stakes Committee of the Thoroughbred Owners and Breeders Association to thoroughbred horse races in the United States and Canada to describe races that derive their name from the stake, or entry fee, owners must pay...

 winner Stop The Music

Stop The Music (horse)

Stop The Music was an American thoroughbred stallion racehorse. Owned and bred in Kentucky by the Greentree Stud, Inc., he was sired by Hail To Reason, out of the mare Bebopper, whose sire, Tom Fool, was the leading broodmare sire for 1965 and was inducted into National Museum of Racing and Hall...

, who in turn was sired by the 1960 U.S. Champion 2-Yr-Old Colt, Hail To Reason

Hail To Reason

Hail To Reason was an American thoroughbred racehorse and an influential sire. He was bred in Kentucky by the Bieber-Jacobs Stable, a partnership of prominent horsemen, Isadore Bieber and Hirsch Jacobs. He was sired by the English stakes winner Turn-To, a grandson of the very influential sire Nearco...

, out of the Tyrant mare Valseuse.

She was purchased as a two-year-old by Ann and Jerome Moss

Jerry Moss

Jerome S. "Jerry" Moss is an American recording executive, best known for being the co-founder of A&M Records, along with trumpeter and bandleader Herb Alpert....

 at the 1992 Fasig-Tipton

Fasig-Tipton

The Fasig-Tipton Company, Inc. is an auction house for Thoroughbred horses founded in 1898 by William B. Fasig and Edward A. Tipton. It is the oldest auction company of its kind in North America....

 Calder sale for $45,000 through the late trainer Brian Mayberry and was named for a song by the recording artist Sting.

Known as a sprint specialist, at age two Set Them Free won the Pasadena Stakes at Santa Anita Park

Santa Anita Park

Santa Anita Park is a thoroughbred racetrack in Arcadia, California, United States. It offers some of the prominent racing events in the United States during the winter and in spring. With its backdrop of the purple San Gabriel Mountains, it is considered by many as the world's most beautiful race...

 and the Debutante Breeders' Cup Stakes at Bay Meadows Racetrack. She placed 11th in the Breeders' Cup Juvenile Fillies

Breeders' Cup Juvenile Fillies

The Breeders' Cup Juvenile Fillies is a 1 1/16-mile thoroughbred horse race on dirt for two-year-old fillies run annually since 1984 at a different racetrack in the United States or Canada as part of the Breeders' Cup World Championships.-Automatic Berths:Beginning in 2007, the Breeders' Cup...

.

Set Them Free is best known, however, not for her racing success as a graded stakes race

Graded stakes race

A graded stakes race is a term applied since 1973 by the American Graded Stakes Committee of the Thoroughbred Owners and Breeders Association to thoroughbred horse races in the United States and Canada to describe races that derive their name from the stake, or entry fee, owners must pay...

 winner but more for her success as a broodmare. She is the dam of not one but two Kentucky Derby

Kentucky Derby

The Kentucky Derby is a Grade I stakes race for three-year-old Thoroughbred horses, held annually in Louisville, Kentucky, United States on the first Saturday in May, capping the two-week-long Kentucky Derby Festival. The race is one and a quarter mile at Churchill Downs. Colts and geldings carry...

 entrants: 2005 winner Giacomo, by Holy Bull

Holy Bull

Holy Bull is an American Hall of Fame Champion Thoroughbred racehorse. He was sired by Great Above, whose dam was the U.S. Racing Hall of Fame filly Ta Wee.-Race History:...

, and Tiago

Tiago (horse)

Tiago, , is an American Thoroughbred Stallion Racehorse. His sire is the 1992 U.S. Outstanding Older Male Horse, Pleasant Tap. His dam is the stakes winning mare Set Them Free, by Stop The Music, making him a half-brother to the 2005 Kentucky Derby winner Giacomo...

, by Pleasant Tap

Pleasant Tap

Pleasant Tap was an American thoroughbred stallion racehorse. He was sired by 1981 Kentucky Derby and Preakness Stakes winner Pleasant Colony, out of the mare, Never Knock...

.

Her 2007 foal is by Pulpit

Pulpit (horse)

Pulpit , is an American Thoroughbred stallion who now performs stud duties at Claiborne Farm for a fee of $60,000 per live foal. His sire is the 1992 Eclipse Award winner for American Horse of the Year and American Champion Three-Year-Old Male Horse, A.P. Indy...

.