Berlo was an American 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...

 Champion 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...

. Bred by William duPont, Jr.

William duPont, Jr.

William duPont, Jr. was an American businessman and banker and a prominent figure in the sport of thoroughbred horse racing. A member of the Delaware Du Pont family, he was the son of William du Pont and Annie Rogers , and brother to horsewoman, Marion.In 1919, he married Jean Liseter Austin...

 at his Walnut Hall Farm near Boyce, Virginia

Boyce, Virginia

Boyce is a town in Clarke County, Virginia, United States. The population was 426 at the 2000 census.-Geography:Boyce is located at ....

, she was out of the mare Faberose, a daughter of duPont's Santa Anita Handicap

Santa Anita Handicap

The Santa Anita Handicap is an American Thoroughbred horse race held annually in early March at Santa Anita Park in Arcadia, California. It is a Grade I race for horses four years old and up , and is considered the most important race for older horses in North America during the winter racing season...

 winner, Rosemont

Rosemont (horse)

Rosemont was an American Thoroughbred racehorse best known for his win in the 1937 Santa Anita Handicap, defeating Seabiscuit, a scene used in the 2003 motion picture Seabiscuit....

. Her sire was the good British runner Heliopolis

Heliopolis (horse)

Heliopolis was a British Thoroughbred racehorse and Champion sire bred and raced by Edward Stanley, 17th Earl of Derby. He was raced from age two to four and then exported during World War II to the Coldstream Stud of E. Dale Shaffer in Lexington, Kentucky and arrived at the port of New York on...

, a son of the six-time Leading sire in Great Britain and Ireland, Hyperion

Hyperion (horse)

Hyperion was a British bred Thoroughbred, a dual classic winner and an outstanding sire. Owned by Edward Stanley, 17th Earl of Derby, Hyperion won £29,509 during his career - a considerable sum at the time. His victories included the Epsom Derby and St...

.

Trained by Richard Handlen

Richard E. Handlen

Richard E. "Dick" Handlen was an American Thoroughbred horse racing trainer whom the March 15, 1937 edition of the Los Angeles Times called "one of the best trainers in America"...

, in 1960 Berlo won five major races including the Coaching Club American Oaks

Coaching Club American Oaks

The Coaching Club American Oaks is a race for thoroughbred three-year old fillies and the second leg of the Triple Tiara of Thoroughbred Racing. Originally run at Belmont Park, the Grade I $250,000 stakes race was moved to Saratoga Race Course in 2010....

, the Beldame Handicap

Beldame Stakes

The Beldame Stakes is an American Grade I Thoroughbred horse race for fillies and mares three-years-old and up. Inaugurated in 1939, it was run as a handicap prior to 1960...

, and on October 12th, the grueling mile and a half Ladies Handicap

Ladies Handicap

The Ladies Handicap is a historic American Thoroughbred horse race for fillies three years of age and older that is held annually at Aqueduct Racetrack in Queens, New York. Inaugurated at the Jerome Park Racetrack in 1868, it is the oldest stakes race in the U.S. exclusively for fillies and mares...

. at New York's

New York

New York is a state in the Northeastern region of the United States. It is the nation's third most populous state. New York is bordered by New Jersey and Pennsylvania to the south, and by Connecticut, Massachusetts and Vermont to the east...

 Belmont Park

Belmont Park

Belmont Park is a major thoroughbred horse-racing facility located in Elmont in the Town of Hempstead in Nassau County, New York, on Long Island adjoining New York City. It first opened on May 4, 1905...

. However, the next day her handlers announced she would not race again that year. Berlo's dominating performances earned her 1960 American Champion Three-Year-Old Filly honors.

Berlo did not return to racing for nearly nine months. Unable to be competitive, she did not win a major race in 1961.

As a broodmare, Berlo met with little success, only Odd Dancer, a son by Native Dancer

Native Dancer

Native Dancer , nicknamed the Grey Ghost, was one of the most celebrated and accomplished Thoroughbred racehorses in history, the first horse made famous through the medium of television. He was one of the best horses produced in USA after the war...

, was a minor race winner.