The chestnutfilly was foaled near Lexington, Kentucky, in 1901. She was by Octagon, out of the English-bred Bella Donna. Named Beldame, she was a homebred of August Belmont Jr.'s, and though Belmont Jr. continued to own her, he leased her as a two- and three-year-old to a business associate named Newton Bennington. Although she won two races before going to Bennington, it was while racing for him that Beldame began her great career, earning her place as number 98 in the Blood-Horse magazineList of the Top 100 U.S. Racehorses of the 20th Century.
Career and retirement
As a two-year-old, Beldame won the Great Filly Stakes at Sheepshead Bay Race Track and the Vernal Stakes. When Beldame was three, she won twelve of her fourteen starts, earning the championship of her division. Her only losses came against older males. That year, she took the Alabama Stakes, the Gazelle Handicap, the Carter Handicap, the Ladies Stakes, the Saratoga Cup, the First Special, the Second Special, the Dolphin Sakes, the Mermaid Stakes, and the September Stakes. In the Ladies Stakes, Beldame got loose under her substitute rider before the race and galloped all over the track looking for an opening to run back to the barn. She found it before her jockey, Gene Hildebrand, got her under control. She returned to the track minutes later, wired the race, and won easily. Due to her success, track officials weighted Beldame so heavily she won only twice at the age of four. That year, she won the Standard Handicap, and then, carrying more weight than the males, she won the Suburban Handicap, beating Broomstick by five lengths. Beldame retired with 17 wins, 6 places, and 4 shows from 31 starts. Her earnings amounted to $102,570. Following Firenze and Miss Woodford, she was the third filly to win more than $100,000. Her usual rider was Hall of FamerFrank O'Neill. Her first trainer, when she was campaigned by Belmont, was Hall of Famer John Hyland. While she was leased to Bennington, Hall of Famer Fred Burlew trained her. After Beldame's retirement, Belmont took her to the re-creation of his father's Nursery Stud, the original farm being dispersed after August Belmont's death.