There have been many great race horses throughout history, but here are some of the most famous ones:

• Secretariat: Widely considered to be one of the greatest racehorses of all time, Secretariat won the Triple Crown in 1973, setting records that still stand today. He won the Kentucky Derby, the Preakness Stakes, and the Belmont Stakes in record-breaking times and was known for his incredible speed and endurance.
• Seabiscuit: A popular racehorse during the Great Depression, Seabiscuit captured the hearts of Americans with his unlikely victories against more prominent horses. His races against War Admiral and his comeback story made him a legend in the world of horse racing.
• Man o’ War: A dominant racehorse during the 1920s, Man o’ War won 20 of his 21 career races. He set several world records and was known for his incredible speed and athleticism.
• Phar Lap: An Australian racehorse who became a national hero during the Great Depression, Phar Lap won the Melbourne Cup and several other races before his untimely death in 1932.
• Red Rum: Red Rum was a three-time winner of the Grand National, one of the most challenging steeplechase races in the world. He was known for his incredible endurance and ability to come from behind in races.
• Black Caviar: An Australian mare, Black Caviar won all 25 of her career races, including 15 at the Group 1 level. She was known for her incredible speed and was a fan favorite in Australia.
• American Pharoah: In 2015, American Pharoah became the first horse in 37 years to win the Triple Crown. He won the Kentucky Derby, the Preakness Stakes, and the Belmont Stakes and was known for his speed and agility.

These horses have become legendary for their incredible achievements and their impact on the sport of horse racing. Their names will always be remembered by racing fans around the world.